string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%88%91%E5%9B%BD%E7%BD%91%E7%BB%9C%E8%90%A5%E9%94%80%E5%AD%98%E5%9C%A8%E7%9A%84%E9%97%AE%E9%A2%98%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.117.144 port 38017: Connection refused"
我国网络营销存在的问题有哪些
