检测节点
| 区域/运营商 | 响应最快 | 响应最慢 | 平均响应 |
|---|---|---|---|
| 全部 | 安徽合肥电信0.135s | 贵州贵阳联通0.89s | 0.35s |
| 电信 | 安徽合肥电信0.135s | 湖北襄阳电信0.44s | 0.246s |
| 移动 | 河北唐山移动0.256s | 新疆昌吉回族自治州移动0.555s | 0.387s |
| 联通 | 山东济南联通0.248s | 贵州贵阳联通0.89s | 0.403s |
| 华东 | 安徽合肥电信0.135s | 安徽淮南移动0.4s | 0.279s |
| 华北 | 河北唐山移动0.256s | 河北唐山联通0.373s | 0.312s |
| 华南 | 海南澄迈县电信0.168s | 广西北海移动0.435s | 0.276s |
| 华中 | 河南驻马店电信0.279s | 湖北襄阳电信0.44s | 0.357s |
| 西北 | 甘肃兰州移动0.378s | 新疆昌吉回族自治州移动0.555s | 0.444s |
| 西南 | 贵州遵义电信0.181s | 贵州贵阳联通0.89s | 0.502s |
| 东北 | 吉林长春移动0.356s | 辽宁沈阳移动0.373s | 0.365s |
|
检测点
运营商
检测节点
|
解析IP |
状态 |
总时间 |
解析时间 |
连接时间 |
操作 |
|---|---|---|---|---|---|---|
|
电信
北京
|
39.98.174.90 （北京阿里云） | 200 | 0.282s | 0.207s | 0.013s |
下载时间：0.031s 下载大小：64.09KB 下载速度：2067.419KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Transfer-Encoding: chunked Content-Type: text/html; charset=utf-8 Content-Encoding: gzip Vary: Accept-Encoding Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=qkrata5laq4but2boo2felyl; path=/; HttpOnly; SameSite=Lax X-Server: NiuCDN 4.0.0.0 X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET Date: Mon, 09 Nov 2026 16:42:11 GMT |
|
电信
安徽合肥
|
39.98.174.90 （北京阿里云） | 200 | 0.135s | 0.064s | 0.031s |
下载时间：0.003s 下载大小：10KB 下载速度：3333.333KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=2q0gn3zsir0w3ualwbrm5j43; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
广西桂林
|
39.98.174.90 （北京阿里云） | 200 | 0.224s | 0.099s | 0.06s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=mnhn54ypbaude4n1bxs4fcs5; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
贵州遵义
|
39.98.174.90 （北京阿里云） | 200 | 0.181s | 0.087s | 0.044s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=4f0sgttjxi0aewry1o5uai0p; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
海南澄迈县
|
39.98.174.90 （北京阿里云） | 200 | 0.168s | 0.049s | 0.056s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=djzrfha0bscadkgglt3escsi; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
河北廊坊
|
39.98.174.90 （北京阿里云） | 200 | 0.345s | 0.284s | 0.014s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=vrfk35adxqessrhwhopr3kwh; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
河南驻马店
|
39.98.174.90 （北京阿里云） | 200 | 0.279s | 0.206s | 0.034s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=aezbz5nqyg44vq2kfay45zcl; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
湖北襄阳
|
39.98.174.90 （北京阿里云） | 200 | 0.44s | 0.367s | 0.034s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=fagxkcjargjv4o5xoocutqfj; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
电信
浙江温州
|
39.98.174.90 （北京阿里云） | 200 | 0.16s | 0.069s | 0.045s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=bisy0x1k5diynl5fiwuqpihd; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
安徽淮南
|
39.98.174.90 （北京阿里云） | 200 | 0.4s | 0.276s | 0.031s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=ac1p1lnairlczcbfrid23ywb; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
甘肃兰州
|
39.98.174.90 （北京阿里云） | 200 | 0.378s | 0.286s | 0.039s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=xxnazrns1nlepbsr5luifglb; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
广西北海
|
39.98.174.90 （北京阿里云） | 200 | 0.435s | 0.309s | 0.057s |
下载时间：0.003s 下载大小：10KB 下载速度：3333.333KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=fflatoj1wdznuomjrqkfx2xa; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
贵州黔南布依族苗族自治州
|
39.98.174.90 （北京阿里云） | 200 | 0.443s | 0.326s | 0.056s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=2wb10uojjvicrca1drav3etc; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
河北唐山
|
39.98.174.90 （北京阿里云） | 200 | 0.256s | 0.2s | 0.025s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=ys5qkd0tmsrbpyxoixwdze1s; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
湖南长沙
|
39.98.174.90 （北京阿里云） | 200 | 0.362s | 0.263s | 0.039s |
下载时间：0.002s 下载大小：10KB 下载速度：5000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=551jencp1uw25zmncz1tv4mh; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
吉林长春
|
39.98.174.90 （北京阿里云） | 200 | 0.356s | 0.284s | 0.029s |
下载时间：0.002s 下载大小：10KB 下载速度：5000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=i5vhvhfbltm33lslqzegnym0; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
辽宁沈阳
|
39.98.174.90 （北京阿里云） | 200 | 0.373s | 0.296s | 0.032s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=v31d1ghzfdtuhz4dvqfmoiut; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
上海
|
39.98.174.90 （北京阿里云） | 200 | 0.38s | 0.294s | 0.034s |
下载时间：0.002s 下载大小：10KB 下载速度：5000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=ojd2dhwltnazqkewchhqofex; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
新疆昌吉回族自治州
|
39.98.174.90 （北京阿里云） | 200 | 0.555s | 0.414s | 0.068s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=rrqm5gwnhpafvjjquls0nerk; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
移动
浙江湖州
|
39.98.174.90 （北京阿里云） | 200 | 0.316s | 0.24s | 0.035s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=pimec2wk23bldwvgfxwq0naj; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
四川
|
39.98.174.90 （北京阿里云） | 200 | 0.494s | 0.318s | 0.043s |
下载时间：0.085s 下载大小：64.09KB 下载速度：754KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Transfer-Encoding: chunked Content-Type: text/html; charset=utf-8 Content-Encoding: gzip Vary: Accept-Encoding Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=jmnj5nzzlst4v0s3u1zuy4yp; path=/; HttpOnly; SameSite=Lax X-Server: NiuCDN 4.0.0.0 X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET Date: Mon, 09 Nov 2026 16:42:11 GMT |
|
联通
北京
|
39.98.174.90 （北京阿里云） | 200 | 0.265s | 0.21s | 0.01s |
下载时间：0.024s 下载大小：64.09KB 下载速度：2670.417KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Transfer-Encoding: chunked Content-Type: text/html; charset=utf-8 Content-Encoding: gzip Vary: Accept-Encoding Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=l4ii04yh4tu5x0awy4sovf0x; path=/; HttpOnly; SameSite=Lax X-Server: NiuCDN 4.0.0.0 X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET Date: Mon, 09 Nov 2026 16:42:11 GMT |
|
联通
贵州贵阳
|
39.98.174.90 （北京阿里云） | 200 | 0.89s | 0.801s | 0.041s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=vce0010sgzg4q31zcywooddf; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
河北唐山
|
39.98.174.90 （北京阿里云） | 200 | 0.373s | 0.31s | 0.024s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=toh0pihxmtqzkch55vzaizgk; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
河南驻马店
|
39.98.174.90 （北京阿里云） | 200 | 0.352s | 0.265s | 0.029s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=3saqkce3ai3k3f0fv4jhja33; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
湖南衡阳
|
39.98.174.90 （北京阿里云） | 200 | 0.351s | 0.27s | 0.033s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=ummn5bhuqax2byyqvurugl3n; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
山东济南
|
39.98.174.90 （北京阿里云） | 200 | 0.248s | 0.209s | 0.015s |
下载时间：0.001s 下载大小：10KB 下载速度：10000KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=hojbfekjxrahdbxnqk2xl22m; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
山西长治
|
39.98.174.90 （北京阿里云） | 200 | 0.35s | 0.282s | 0.018s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=i0je0ayqhk4vstckaxohkmzn; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
陕西西安
|
39.98.174.90 （北京阿里云） | 200 | 0.398s | 0.339s | 0.027s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:11 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=bw5jhszjjv4brbrlalg0swx4; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
|
联通
上海
|
39.98.174.90 （北京阿里云） | 200 | 0.312s | 0.247s | 0.03s |
下载时间：0s 下载大小：10KB 下载速度：0KB/s HEAD：
HTTP/1.1 200 OK Cache-Control: private Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Mon, 09 Nov 2026 16:42:10 GMT Server: Microsoft-IIS/10.0 Set-Cookie: ASP.NET_SessionId=o1fj4ztyxc5y5a4qo1huqspb; path=/; HttpOnly; SameSite=Lax Vary: Accept-Encoding X-Cache: Hit from 2026-11-01 03:37:07 on 01033707 X-Powered-By: ASP.NET X-Server: NiuCDN 4.0.0.0 |
查询结果仅供参考，不保证100%准确。
最新检测
网站测速
PING检测
劫持检测
