string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E5%9B%BD%E6%9C%80%E5%BF%AB%E7%9A%84dns%E5%9C%B0%E5%9D%80%E6%98%AF => Failed to connect to 101.89.143.195 port 38175: Connection refused"
中国最快的dns地址是
