string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BC%9A%E5%91%98%E8%90%A5%E9%94%80%E4%BD%9C%E7%94%A8%E7%9B%AE%E7%9A%84 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
会员营销作用目的
