string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%A7%E8%BF%9E%E5%B8%82%E5%92%8C%E6%B2%88%E9%98%B3%E5%B8%82%E5%93%AA%E4%B8%AA%E7%BA%A7%E5%88%AB%E9%AB%98 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
大连市和沈阳市哪个级别高
