string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%A9%E7%94%A8%E6%83%85%E6%84%9F%E8%90%A5%E9%94%80%E7%9A%84%E6%A1%88%E4%BE%8B%E5%88%86%E6%9E%90%E9%97%AE%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
利用情感营销的案例分析问题及答案
