string(245) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BA%E4%BB%80%E4%B9%88cmtds%E8%83%BD%E6%8F%90%E9%AB%98%E7%BD%91%E9%80%9F => Failed to connect to 101.89.143.195 port 38175: Connection refused"
为什么cmtds能提高网速
