string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BC%A0%E6%89%BF%E5%92%8C%E7%BB%A7%E6%89%BF%E7%9A%84%E5%85%B3%E7%B3%BB => Failed to connect to 125.88.227.171 port 38062: Connection refused"
传承和继承的关系
