答案1
我想我(终于!)找到了一个令人满意的答案;我将它发布给那些想知道的人。
\usepackage{titlesec} % For the \titleformat
\usepackage{fancybox} % For the \ovalbox
\setlength{\fboxsep}{10pt} % Sets the padding of the boxes
\cornersize{.3} % Sets the roundness of the corners of the \ovalbox
% Syntax: \titleformat{command}[shape]{format}{label}{sep}{before}[after]
\titleformat{\chapter}
[hang] % Places the chapter name next to the number, (default: 'display')
{\Huge\bfseries}
{\Ovalbox{\thechapter}}
{10pt}
{\Huge}
\titlespacing*{\chapter}{0pt}{0pt}{20pt} % Sets the margins of the chap. title block
看来这个办法很有效!