# 18

家里有一堆书。满满的装了几个书架。每每书还没有看完一本新书又要到了。无论哪一本都有可用之处。那些在书架上放了多年的，现在看着还是道理依然。有句话说道路：经历的所有弯路都是必经之路。知识也是一样。它们萌发、成长和开花、结果。它们是你的必有之物。早安，世界。早安，未来。早安，有知识的你。

<figure><img src="/files/qZd6pgNWvgy0yFe1Ynoh" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://www.oulan.com/2017/09/18.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.