string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E5%81%9A%E7%BD%91%E7%BB%9C%E8%BF%90%E8%90%A5%E6%8E%A8%E5%B9%BF%E5%B7%A5%E4%BD%9C => Failed to connect to 14.18.117.71 port 38041: Connection refused"
怎么做网络运营推广工作
