% 文档类声明，用于指定文档类型，常用类包括article、report、book 等
\documentclass{article}

% 导言区，用于设置全局参数、加载宏包、定义命令等
\usepackage{graphicx} 

% 正文区，由 \begin{document} 和 \end{document} 包裹，包含文本、公式、图表等。
\begin{document}
    % 设置标题、作者等
    \title{test}
    \author{Hua Li}
    \date{October 2025}
    % 生成标题
    \maketitle

    % 普通句子
    1. Fireheart shivered. His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.
    
    % 注释后半部分
    2. Fireheart shivered. % His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.

    % 有缩进
    \indent 3. Fireheart shivered. His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.

    % 无缩进
    \noindent 4. Fireheart shivered. His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.

    % 加粗
    \textbf{5. Fireheart shivered. His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.}

    % 斜体
    \textit{6. Fireheart shivered. His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.}

    % 换行
    7. Fireheart shivered. \\ His flame-colored fur wasstill greenleaf-light; it would be a few moons before it was thick enough to keep out cold like this.
    
    % 字号
    8. {\tiny aa} {\small bb} {\large cc}

\end{document}