我有这种病症：
脚本部分如下所示：
\begin{figure}[!h]
\begin{center}
\includegraphics[scale=0.7]{TotalDuration}
\end{center}
\end{figure}
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\begin{figure}[!h]
\begin{center}
\includegraphics[scale=0.7]{TotalDurationBarPlotEnhanced}
\end{center}
\end{figure}
\begin{algorithm}[!htb]
$n \leftarrow \mathrm{new\ node}$ \\
$n.data \leftarrow x$ \\
$n.prev \leftarrow L.sentinel$ \\
$n.next \leftarrow L.sentinel.next$ \\
$L.sentinel.next.prev \leftarrow n$ \\
$L.sentinel.next \leftarrow n$ \\
\caption{\textsc{Add-First}$(L, x)$}
\label{alg:add-first}
\end{algorithm}
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\begin{algorithm}[!htb]
$n \leftarrow L.sentinel.prev$ \\
$n.prev.next \leftarrow L.sentinel$ \\
$L.sentinel.prev \leftarrow n.prev$ \\
$n.prev \leftarrow $ \textbf{nil} \\
$n.next \leftarrow $ \textbf{nil} \\
\caption{\textsc{Remove-Last}$(L)$}
\label{alg:remove-last}
\end{algorithm}
\printbibliography