string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8B%BC%E5%A4%9A%E5%A4%9A%E8%BF%90%E8%90%A5%E9%9A%BE%E7%82%B9%E5%88%86%E6%9E%90 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
拼多多运营难点分析
