string(258) "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%E9%83%AD%E5%BB%BA%E5%8D%8E%E8%AE%B2%E4%B9%89%E7%99%BE%E5%BA%A6%E4%BA%91 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
注会郭建华讲义百度云
