答案1
这并不难titlesec
:
\documentclass[12pt, a4paper]{book}%
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{lipsum}
\usepackage{titlesec}%
\titleformat{\chapter}[display]{\sffamily\huge\bfseries}{\filleft\chaptername \thechapter}{4ex}{}[{\titlerule[1.5pt]}]
\begin{document}
\chapter{Introduction}
\sffamily
\lipsum[11]
\end{document}