有一个软件，WeChatdownload很方便，具体参看这篇文章，可以直接下word和PDF到本地
https://mp.weixin.qq.com/s?__biz=MzA5NjEwNjE0OQ==&mid=2247497473&idx=1&sn=e0cd85f7ff69c29ef43ec4ca38ba48d2&chksm=90b794cba7c01ddd52383b5ad11a49fc8cdd37aa6c67e5b2e9a19a4abd3560597b1c9c7ff51c#rd&rd2werd=1#wechat_redirect