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%E7%9F%A5%E8%AF%86%E7%82%B9%E5%BD%92%E7%BA%B3 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
注会知识点归纳
