string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E6%A1%88%E4%BE%8B%E6%80%8E%E4%B9%88%E5%AD%A6%E6%AF%94%E8%BE%83%E5%A5%BD%E4%B8%80%E7%82%B9 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
监理案例怎么学比较好一点
