修改考试类中的 \question \part \subparts 环境

Question

我想修改\question \part和\subpart环境以包含一个额外的可选参数。

例如当前考试类别有以下内容\question[1]，显示该问题的分数。

我想添加一个新的可选参数，例如\question[1][4]4 将调用命令\fillwithdottedlines{4}

平均能量损失

\documentclass{exam}
\begin{document}
\begin{questions}
    \question[1]
    Question number 1 has 4 lines
    \fillwithdottedlines{2cm}
    % Ideally i would like to write \question[1][2]
    \question
    \begin{parts}
        \part[1]
        This part has 4 lines.
        \fillwithdottedlines{2cm}
        % Ideally i would like to write \part[1][2]
        \part[3]
        This part does not not have lines.
        % Leave as it is.
    \end{parts}
\end{questions}
\end{document}