string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%96%B9%E6%B3%95%E6%8E%AA%E6%96%BD%E6%96%B9%E9%9D%A2%E7%9A%84%E9%97%AE%E9%A2%98%E6%B8%85%E5%8D%95 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
方法措施方面的问题清单
