string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%93%AA%E4%B8%AAdns%E4%B8%8A%E7%BD%91%E6%9B%B4%E5%BF%AB%E4%B8%80%E7%82%B9 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
哪个dns上网更快一点
