string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%81%B6%E6%80%A7%E8%82%BF%E7%98%A4%E8%83%BD%E6%A0%B9%E6%B2%BB%E5%90%97 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
恶性肿瘤能根治吗
