string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E7%AE%80%E5%8D%95%E6%89%93%E9%A2%86%E5%B8%A6%E6%96%B9%E6%B3%95 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
最简单打领带方法
