string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%9C%89%E6%95%88%E7%9A%84%E6%8E%A8%E5%B9%BF%E5%87%80%E6%B0%B4%E5%99%A8%E4%B8%9A%E5%8A%A1%E5%91%A2 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
如何有效的推广净水器业务呢
