string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BE%88%E5%A5%BD%E7%9A%84%E9%94%BB%E7%82%BC%E8%87%AA%E5%B7%B1 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
很好的锻炼自己
