Latex 循环插图、文件名包含空格

\foreach \n in{1,...,15}
{
\begin{figure}
\centering
\includegraphics[width=10cm]{pictures//rela\n}
 \caption{Attribute\n}
 \label{fig:1}
\end{figure}
}

\clearpage
\foreach \n in{16,...,30}
{
\begin{figure}
\centering
\includegraphics[width=10cm]{pictures//rela\n}
 \caption{Attribute\n}
 \label{fig:1}
\end{figure}
}

\clearpage
\foreach \n in{31,...,35}
{
\begin{figure}
\centering
\includegraphics[width=10cm]{pictures//rela\n}
 \caption{Attribute\n}
 \label{fig:1}
\end{figure}
}

 文件名中有空格。

\foreach \n in{1,...,2}
{
\begin{figure}
\centering
\includegraphics[scale=0.4]{pictures//raw//\string "1 (\string"\n)}
 \caption{Attribute\n}
 \includegraphics[scale=0.4]{pictures//em//\string "8em2 (\string"\n)}
 \caption{Attribute\n}
\end{figure}
}