string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%88%91%E5%9B%BD%E7%9A%84%E4%B8%89%E5%A4%A7%E6%B5%B7%E5%B3%A1%E8%87%AA%E5%8C%97%E5%90%91%E5%8D%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
我国的三大海峡自北向南
