如何删除图形上方的多余空间

Question

这是 tex 文件

Thus, speculatively, higher-order antibunching might play a role superior to usual antibunching. Note that such a prominence of higher-order antibunching was discovered for the first time in [22] for two-mode coherent states.
\end{flushleft}
\begin{flushleft}
\begin{figure}[t]
\includegraphics[scale=0.8]{Hinh2.jpg}
\centering
\caption{Single-mode $l$ th-order antibunching of mode $a, A_{a;l}$, as a function of the order $l$ at $r = 4$ and $p = q = 2$ (circles) and $p = q = 4$ (triangles).}
\end{figure}
\end{flushleft}

输出的pdf是：

图形上方有一个意外的多余空间。请帮我如何删除它。