string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%90%A5%E9%94%80%E6%8E%A8%E5%B9%BF%E5%B9%B3%E5%8F%B0%E6%96%B9%E6%B3%95 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
营销推广平台方法
