string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%82%E5%9C%BA%E8%90%A5%E9%94%80%E8%AF%BE%E7%A8%8B%E7%AC%94%E8%AE%B0 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
市场营销课程笔记
