string(265) "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%95%88%E6%9E%9C%E4%B8%8D%E5%A5%BD%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 14.18.117.71 port 38133: Connection refused"
短信营销效果不好怎么办
