string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BE%E4%BE%8B%E8%AF%B4%E6%98%8E%E5%B9%BF%E5%91%8A%E4%B8%8E%E5%85%AC%E5%85%B3%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 101.89.117.144 port 38022: Connection refused"
举例说明广告与公关的区别
