> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-cn/zhi-shi-ku/122-preamble-organization.md).

# 前言组织

## 简介

## 通用思路

基本思路是以细粒度方式组织导言区：从最通用的宏包和设置开始，逐步排列到更具项目针对性的宏包和设置，最后放置用户宏。这主要有三个原因：

1. 这适用于依赖关系；一般来说，用户宏依赖于已加载的宏包。数学及其他宏包可能依赖于已加载的字体。
2. 变化最频繁的内容放在最后，最接近文档主体。
3. 这有助于保持导言区条理清晰，并使内容更容易查找和调整。

不过，这也有例外，因为有些宏包的加载顺序确实很重要，参见 [#宏包加载顺序例外](#package-loading-order-exceptions) 列表。

## 一些示例

## 将导言区放入单独的文件

可以将导言区放到一个单独的文件中。基本有三种方式：

* 将导言区移到一个标准位置 `.tex` 并使用 `\input{...}`.
* 把所有内容放入用户宏包并使用 `\usepackage{...}`.
* 把所有内容放入用户类并使用 `\documentclass{...}`.

无论哪种方式，始终最好把 `\documentclass{...}` 放在主文件中，并将主文件保存在项目的顶层文件夹中。

## 宏包加载顺序例外

对于某些宏包，加载顺序很重要；因此它们不能遵循前面给出的通用思路。


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