string(350) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%83%85%E6%84%9F%E8%90%A5%E9%94%80%E7%9A%84%E4%BE%8B%E5%AD%90%2C%E4%BC%9A%E5%91%98%E8%90%A5%E9%94%80%E7%9A%84%E4%BE%8B%E5%AD%90%E8%AF%B4%E6%98%8E%E6%88%90%E5%8A%9F%E5%8E%9F%E5%9B%A0 => Failed to connect to 101.89.120.29 port 38231: Connection refused"
情感营销的例子,会员营销的例子说明成功原因
