我想将图像一个接一个地放置，而不允许将任何文本放置在空闲空间中。我有 2 个附录，采用 IEEEtran 双列格式。两个附录都只有图片。附录 B 应该在附录 A 中的所有图片都放置之后开始。但附录 B 的文本会放在那之前。
\appendices
\section{Examples of Emails in Gmail's Spam folder}
Below are screenshots of various types of warning messages shown by Gmail for different types of emails we found in Gmail's spam folder.
\begin{figure}[h!]
\centering
\includegraphics[width=\columnwidth]{imgs/gmail_spam/spam_spam}
\end{figure}
\begin{figure}[h!]
\centering
\includegraphics[width=\columnwidth]{imgs/gmail_spam/spam_phishing}
\end{figure}
\begin{figure}[h!]
\centering
\includegraphics[width=\columnwidth]{imgs/gmail_spam/spam_steal2}
\end{figure}
\section{Examples of Phishing Emails}
Below are some examples.
\begin{figure}[h!]
\centering
\includegraphics[width=\columnwidth]{imgs/phish_email/email1_neu}
\caption{Example 1}
\label{fig:email1}
\end{figure}
\begin{figure}[h!]
\centering
\includegraphics[width=\columnwidth]{imgs/phish_email/email2_neu}
\caption{Example 2}
\label{fig:email2}
\end{figure}
在附录 A 中，没有剩余空间供第二幅图使用，因此第二幅图移至下一页。但在剩余的空间中，却写入了附录 B 的文本。如何避免这种情况？