string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%90%9C%E7%B4%A2%E6%80%8E%E6%A0%B7%E6%8F%90%E9%AB%98%E7%BD%91%E7%BB%9C%E9%80%9F%E5%BA%A6%E5%91%A2 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
搜索怎样提高网络速度呢
