string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%BD%A6%E4%B8%8A%E7%9A%84%E5%86%85%E5%A4%96%E5%BE%AA%E7%8E%AF => Failed to connect to 101.89.143.195 port 38175: Connection refused"
车上的内外循环
