string(256) "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%E4%B9%88%E6%8F%90%E5%8D%87%E7%BD%91%E7%BB%9C%E9%80%9F%E5%BA%A6 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
搜索怎么提升网络速度
