string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%87%91%E5%88%9A%E5%B7%9D%E7%9A%84%E7%9C%9F%E5%AE%9E%E6%83%85%E5%86%B5 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
金刚川的真实情况
