string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=980%E5%85%AC%E8%80%83%E7%BD%91%E8%AF%BE%E8%AE%B2%E8%AF%BE%E6%9C%AC%E5%90%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
980公考网课讲课本吗
