> 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/2017/07/24.md). # 24 观察世界，跟踪数据，实验会有成败。失败了可以分析原因，找到根源。成功也应该知道为什么会成功。早安，世界。早安，未来。早安，心中有数的你。