string(258) "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%E6%8E%A8%E5%B9%BF%E6%9C%89%E4%BB%80%E4%B9%88%E6%8A%80%E5%B7%A7%E6%B2%A1 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
网络推广有什么技巧没
