> 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/2017/04/16.md).

# 16

学习最快乐。早安，开心的每一天。

<figure><img src="/files/PlGYdsOlhhDitMN7B0bJ" alt=""><figcaption></figcaption></figure>