如何使其像下面的输出一样工作？

Question

以下是我从 MWE 获得的输出：

注意，我定义了一个命令\qfrom来添加每个案例中问题的来源。当问题来源未知时，它将为空。

如何使其像下面的输出一样工作？

或者qfrom可以位于左边距。

平均能量损失

\documentclass{exam}
\pointname{}
\pointsinrightmargin

\newcommand{\qfrom}[1]{\hfill{[#1]}}
\usepackage{geometry}
\geometry{
paper = a4paper,
outer = 3in
}


\begin{document}
  \begin{questions}
    \question[10]
    Why is there air?

    \question[15] \qfrom{JAM2018}
    How much wood would a woodchuck chuck if a woodchuck could chuck
    wood?

\qformat{\thequestion. \textbf{[\thequestiontitle]}\hfill}

    \titledquestion{Title of the Quesiton}[10] \qfrom{NEST2015}
    Compute $\displaystyle\int_0^1 x^2 \, dx$. 

  \end{questions}

\end{document}

附言：由于某种原因，我也需要标题问题，所以我不想对其进行格式化。

Answer 1

下面是一个尝试解决您的问题的示例。首先，\qform必须在实际问题之前调用。它将其参数保存到名为的宏中\qfromsource。该宏稍后会使用。

接下来，我们\droppoints从exam类中重新定义宏，将宏\qfromsource与分配给问题的点一起打印。

在开始提问之前，\qfromat必须调用\droppoints它。参见代码。

\documentclass{exam}
\pointname{}
\pointsinrightmargin

\newcommand{\qfrom}[1]{\global\def\qfromsource{#1}}

\usepackage{geometry}
\geometry{
paper = a4paper,
outer = 3in,
}

\makeatletter
\def\droppoints{%
  \leavevmode\unskip\nobreak\hfill
  \rlap{\hskip\rightmargin  % Defined by the list environment
        \hskip\@rightmargin % Defined by exam.cls
        \hskip-\rightpointsmargin
        \llap{[\qfromsource] (\thepoints)}%
  }% rlap
  \par
}
\makeatother


\begin{document}
  \begin{questions}
    \qformat{\thequestion. \textbf{[\thequestiontitle]}\droppoints}

    \qfrom{JAM2018}
    \titledquestion{Some physics}[5]
    Why is there air?


    \qfrom{JAM2018}
    \titledquestion{Question for dyslectics}[15]
    How much wood would a woodchuck chuck if a woodchuck could chuck
    wood?


    \qfrom{NEST2015}
    \titledquestion{Simple integration}[10]
    Compute $\displaystyle\int_0^1 x^2 \, dx$. 

  \end{questions}

\end{document}