string(285) "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%E8%BF%90%E8%90%A5%E6%8E%A8%E5%B9%BF%E5%85%B7%E4%BD%93%E5%81%9A%E4%BB%80%E4%B9%88%E7%9A%84%E5%91%A2 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
网络运营推广具体做什么的呢
