string(226) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=1000%E5%85%86%E7%BD%91%E9%80%9F%E6%98%AF%E5%A4%9A%E5%B0%91mb => Failed to connect to 14.18.117.71 port 38093: Connection refused"
1000兆网速是多少mb
