如何将考试说明仅附加在第一页页眉的末尾？

Question

我需要修复以下代码，使说明附加到第一页标题的末尾，以便将第一页上的考试主体向下推，而不是将标题向上推。

首页页眉

---

---

第二页页眉

\documentclass{exam}
\usepackage{graphicx,enumitem}
\usepackage[raster,skins,fitting]{tcolorbox}


\newcommand\headerBody{%
    \begin{tcbitemize}[
        raster valign = bottom,
        valign = bottom,
        raster columns = 2,
        blankest,
        raster before skip = 0ex, raster after skip = 1ex,
        ]
        \tcboxfit[add to width = 2cm, halign = flush left,height=3em, valign=bottom]{%
            First\\
            Second\\
        }
        \tcbitem[add to width = -2cm, halign = flush right,] \includegraphics[height = 3em]{example-image}
    \end{tcbitemize}}

\newcommand{\Instructions}{%
    \begin{tcbraster}[
        raster columns = 1,
        valign = center,
        raster before skip = 1ex, raster after skip = 1ex,
        blankest,
        height = 14em, 
        ]
        \tcboxfit[ halign = flush left , right = 1ex]{%
            \textbf{Important Rules:}
            \begin{itemize}[
                label = \textbullet, leftmargin=*, labelsep = \fontdimen2\font, itemsep = 0.5\baselineskip, %nosep
                topsep = 0.5\baselineskip
                ]
                \item One.
                
                \item Two.
            \end{itemize}%
        }       
    \end{tcbraster}
}

\newcommand\FirstHeader{%
    \begin{minipage}[b][][t]{\textwidth}%
        \begin{tcbraster}[
            fit algorithm = hybrid,
            raster equal height = rows,
            raster halign = center, raster valign = center,
            raster equal skip = 0mm, raster force size = false,
            boxsep = 0pt, beforeafter skip = 0pt, leftright skip = 0pt,
            nobeforeafter,
            height = 2em,
            ]
            \headerBody%
            \vspace*{1ex}%
            \hrule%
            \Instructions
        \end{tcbraster}%
    \end{minipage}%
}

\newcommand\RunningHeader{%
    \begin{minipage}[b][][t]{\textwidth}%
        \begin{tcbraster}[
            fit algorithm = hybrid,
            raster equal height = rows,
            raster halign = center, raster valign = center,
            raster equal skip = 0mm, raster force size = false,
            boxsep = 0pt, beforeafter skip = 0pt, leftright skip = 0pt,
            nobeforeafter,
            height = 2em,
            ]
            \headerBody%
            \vspace*{1ex}%
            \hrule%
        \end{tcbraster}%
    \end{minipage}%
}



\pagestyle{headandfoot}
\firstpageheader{}{\FirstHeader}{}
\runningheader{}{\RunningHeader}{}
\firstpagefooter{}{first footer}{}
\runningfooter{}{running footer}{}


\usepackage[
a4paper,
includehead, 
top = 0 mm,
headheight = 5em,
headsep = 0\baselineskip,
includefoot,
foot = 0 em,
bottom = 5.5 em,
showframe
]{geometry}

\begin{document}
    text
    \newpage
    another text
\end{document}

Answer 1

首选：使用\firstpageheader{}{\RunningHeader}{} 和

\begin{document}
\Instructions

text        

\newpage
another text
\end{document}

第二种选择（如果出于某种原因你需要/想要在标题中包含说明）：使用相同的序言

\begin{document}
\newgeometry{includehead, 
           textheight=22.7 cm, % to be adjusted according the height of Instructions <<<
            headheight = 50em,
            headsep = 0\baselineskip,
            includefoot,
            foot = 0 em,
            bottom = 5.5 em,
            showframe}
    
        text    
\restoregeometry    

    \newpage
    another text
\end{document}

结果类似，第一个选项是最简单的答案。（我添加了更多项目来测试第二个选项）