string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%97%E9%83%A8%E6%B9%BE%E7%9A%84%E5%89%8D%E6%99%AF%E6%9C%89%E5%A4%9A%E5%A4%A7 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
北部湾的前景有多大
