> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2017/11/21.md). # 21 在寒冷的冬天，冷风呼呼而过，一条温暖的秋裤必不可少。如果不穿，当然也问题不大，发抖也可以短暂的保持温度。事情就是这样，适应时节的变化，搞定对应的措施。早安，世界。早安，未来。早安，暖呼呼的你。