string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%9B%BD%E5%86%85dns%E5%9C%B0%E5%9D%80%E5%93%AA%E4%B8%AA%E6%9C%80%E5%BF%AB => Failed to connect to 101.89.166.210 port 38089: Connection refused"
国内dns地址哪个最快
