> 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/2017/12/04.md). # 04 冬天的时候万物凋零，在枯萎和光阴中慢慢积聚着能量。自冰河消融之时，草籽发芽，树叶生发。思考也是这样。早安，世界。早安，未来。早安，开始思考吧。