string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ping%E5%80%BC%E5%A4%AA%E9%AB%98%E4%BC%9A%E6%80%8E%E4%B9%88%E6%A0%B7 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
ping值太高会怎么样
