string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=4g%E6%8E%A5%E5%85%A5%E7%82%B9cmtds%E5%92%8Cctnet%E5%93%AA%E4%B8%AA%E5%BF%AB => Failed to connect to 61.171.74.35 port 38027: Connection refused"
4g接入点cmtds和ctnet哪个快
