RSS 中的文章预览
三年前开始，该网站的 RSS 订阅仅包含文章标题和日期，内容非常单薄。许多读者请求我至少在 feed 中包含文章预览，但由于听起来在技术上实现起来很困难，我一直拖延。该 RSS 订阅的生成分为两步：首先在 Emacs Lisp 中通过循环构建 Org 元素语法树并渲染为临时 Org 文件，然后利用常规的 Org 导出框架及 ox-rss 后端将其导出为 RSS 文件。
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