章节格式、字体大小

Question

我创建了一个分配任务的模板

能否在对称性方面做得更好

\documentclass{article} 
\usepackage{enumitem}
\usepackage{geometry}
\usepackage{xcolor}
\renewcommand*\familydefault{\sfdefault}
\begin{document}
                \begin{center}{\large \textbf{HANDING / TAKING OVER}}\end{center}
            \begin{description}         

\item {\textbf {\fbox{AON for CHT}}}
\item 11 Nov 2019
\subitem \fcolorbox{black}{green}{Preetha} check progress with IFA
\item 12 Nov 2019
\subitem \fcolorbox{black}{green}{Preetha} to liaise with IFA
            \end{description}
            \begin{description}         
\item {\textbf {\fbox{AON for DEO}}}
\item 11 Nov 2019
            % \begin{enumerate}[labelindent=\parindent,leftmargin=*, label=\alph*)]
\subitem \fcolorbox{black}{green}{Preetha} check progress with IFA
\item 12 Nov 2019
\subitem \fcolorbox{black}{green}{Preetha} to liaise with IFA
            % \end{enumerate}
            \end{description}
\end{document}

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