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% 方法1：使用 h! 参数
\begin{figure}[h!]
\centering
\includegraphics{your_image}
\caption{图片标题}
\end{figure}
% 方法2：使用 H 参数（需要引入 float 包）
\usepackage{float} % 在导言区添加
\begin{figure}[H]
