string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%B8%AD%E5%AD%90%E6%8A%97%E7%97%85%E8%83%BD%E5%8A%9B%E5%BC%BA%E5%90%97 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
鸭子抗病能力强吗
