T5nDY代码如下: 选自http://tex.stackexchange.com/questions/16964/block-quote-with-big-quotation-marks

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage{libertine}
\usepackage{graphicx}
\usepackage[svgnames]{xcolor}
\usepackage{framed}

\newcommand*\openquote{\makebox(25,-22){\scalebox{5}{``}}}
\newcommand*\closequote{\makebox(25,-22){\scalebox{5}{''}}}
\colorlet{shadecolor}{Azure}

\makeatletter
\newif\if@right
\def\shadequote{\@righttrue\shadequote@i}
\def\shadequote@i{\begin{snugshade}\begin{quote}\openquote}
\def\endshadequote{%
\if@right\hfill\fi\closequote\end{quote}\end{snugshade}}
\@namedef{shadequote*}{\@rightfalse\shadequote@i}
\@namedef{endshadequote*}{\endshadequote}
\makeatother

\begin{document}

\begin{shadequote}
Some quoted words
\end{shadequote}

\begin{shadequote*}
Some quoted words
\end{shadequote*}

\begin{shadequote}
A common mistake that people make when trying to design something completely
foolproof is to underestimate the ingenuity of complete fools.\par\emph{Douglas Adams}
\end{shadequote}

\end{document}