我刚刚开始学习 LaTeX，并尝试使用多列和图形。首先，我想知道是否有比我进入和退出多列环境（例如任务 7 中的图形）更好的插入宽图形的方法。其次，我想知道是否可以采取一些措施来消除任务 8 下的空白。这是我使用的代码及其生成的内容。感谢您的帮助 :)
\begin{figure}[H]
\centering
\includegraphics[width=\linewidth]{decay time background}
\caption{Plots removing background noise for D0 decay time.The blue histogram represents the signal only region while the orange histogram represents the background region. The red plot is the difference between the signal and the background.}
\label{fig: decay time background}
\end{figure}
\begin{multicols}{2}
\textbf{Task 8}
The known value of $0.4103 \pm 0.0010 ps$ from Particle Data Group is within 4 standard deviations of value from the fit of $\tau = 0.4141 \pm 0.0015 ps$ from Figure \ref{fig: decay time fit}. Systematic error could be due to a calibration error in the measurements of position and momentum or possibly due to interference from external magnetic fields.
\begin{figure}[H]
\centering
\includegraphics[width=\linewidth]{decay time fit}
\caption{Fit for decay time with $\tau = 0.4141 \pm 0.0015 ps$}
\label{fig: decay time fit}
\end{figure}
\textbf{Task 9}
