string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B7%A5%E4%BD%9C%E4%B8%8A%E5%AD%98%E5%9C%A8%E9%97%AE%E9%A2%98%E5%8F%8A%E6%95%B4%E6%94%B9%E6%8E%AA%E6%96%BD => Failed to connect to 101.89.159.206 port 38100: Connection refused"
工作上存在问题及整改措施
