string(229) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E5%85%AC%E8%AE%A4%E6%9C%80%E5%BF%AB%E7%9A%84dns => Failed to connect to 101.89.159.206 port 38100: Connection refused"
2020年公认最快的dns
