string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%AD%E4%BF%A1%E8%90%A5%E9%94%80%E6%98%AF%E4%BB%80%E4%B9%88%E5%B7%A5%E4%BD%9C%E5%86%85%E5%AE%B9%E5%95%8A => Failed to connect to 125.88.227.171 port 38062: Connection refused"
短信营销是什么工作内容啊
