string(243) "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%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E5%9B%A0 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
ping值太高是什么原因
