string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%9D%E7%BA%A7%E6%B6%88%E9%98%B2%E5%91%98%E6%95%99%E6%9D%90 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
初级消防员教材
