string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%AF%9D%E9%94%80%E5%94%AE%E5%92%8C%E7%BD%91%E7%BB%9C%E9%94%80%E5%94%AE%E7%9A%84%E5%88%A9%E4%B8%8E%E5%BC%8A => Failed to connect to 101.89.159.206 port 38087: Connection refused"
电话销售和网络销售的利与弊
