string(230) "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%E7%BB%A7%E6%89%BF%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 101.91.112.32 port 38221: Connection refused"
传承继承的区别
