string(251) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8E%A9%E6%B8%B8%E6%88%8Fping%E9%AB%98%E5%A5%BD%E8%BF%98%E6%98%AF%E4%BD%8E%E5%A5%BD => Failed to connect to 14.116.215.7 port 38225: Connection refused"
玩游戏ping高好还是低好
