string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E6%8E%A8%E5%B9%BF%E7%9A%84%E6%B8%A0%E9%81%93%E5%92%8C%E6%96%B9%E5%BC%8F%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.117.144 port 38017: Connection refused"
网络推广的渠道和方式有哪些
