string(305) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2016%E5%B9%B4%E5%A5%A5%E8%BF%90%E4%BC%9A%E7%9A%84%E4%B8%BE%E5%8A%9E%E5%9C%B0%E7%82%B9%E6%98%AF%E5%93%AA%E4%B8%AA%E5%9B%BD%E5%AE%B6%E7%9A%84 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
2016年奥运会的举办地点是哪个国家的
