string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E5%A5%BD%E7%94%A8%E7%9A%84%E9%A2%98%E5%BA%93 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
注会好用的题库
