string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%90%84%E7%A7%8D%E6%89%93%E9%A2%86%E5%B8%A6%E7%9A%84%E6%96%B9%E6%B3%95 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
各种打领带的方法
