string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E5%B8%A6%E5%AE%BD%E6%80%8E%E4%B9%88%E6%9F%A5%E7%9C%8B => Failed to connect to 61.171.74.35 port 38027: Connection refused"
网络带宽怎么查看
