保证金设置不一致

Question

我目前正在写论文。文本边距要求为上 2cm、右 2cm、左 4cm 和下 2cm。我的设置适用于所有页面，但章节标题所在的页面除外。有什么办法可以解决这个问题？我正在使用 pdfLaTeX 编译器。

**\documentclass[12pt,a4paper]{report}

\usepackage{amsmath, amsthm, amssymb}
\usepackage{array}
\usepackage{anysize}
\usepackage{faktor} 
\usepackage{placeins}
\usepackage{float}
\usepackage{enumerate}
\usepackage{fancyhdr}%for page number font
\usepackage{lmodern}%also for page number font
\usepackage[pdftex]{graphicx}
\usepackage{caption}
\usepackage{booktabs, calc, cleveref}
\usepackage{mathptmx}%Font: Times New Roman
\usepackage{setspace}
\usepackage[font={small},labelfont=bf]{caption}
\usepackage[titles]{tocloft}
\usepackage[notquote]{hanging}
\usepackage{sectsty}.
  \chapternumberfont{\nohang\centering\large\MakeUppercase} 
  \chaptertitlefont{\nohang\centering\large\MakeUppercase}
  \sectionfont{\fontsize{12}{15}\selectfont}
\usepackage{tikz}
\usepackage[final]{pdfpages}
\usepackage[footskip=1cm]{geometry}
\geometry{
   left=40mm,
   right=20mm,
   top=20mm,
   bottom=20mm,
 }
 %%%%%%%
\renewcommand{\cftchapleader}{\cftdotfill{\cftdotsep}}
\renewcommand\cftchappresnum{CHAPTER } 
   \cftsetindents{chapter}{0em}{6em}      

\pagestyle{fancy}
\lhead{}
\chead{}
\rhead{}
\lfoot{}
\cfoot{}
\rfoot{\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
 %%%%
\fancypagestyle{plain}{
\fancyfoot{}
\fancyfoot[R]{\fontsize{10pt}{10pt}\selectfont\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}}
\pagestyle{plain}
%%%%
\renewcommand{\contentsname}{Table of Contents}
\renewcommand{\bibname}{REFERENCES}
%%%%%

\setstretch{2}
%%%%%%%%%%%

\begin{document}
\pagenumbering{arabic} 
\setcounter{page}{1}
%Chapter 1
\chapter{\MakeUppercase{INTRODUCTION}}

\section{Background of study} 
Associating a group with a graph and finding relationships between them is 
an area of research that has generated much interest. Research on this 
subject aims at investigating relationships between groups and graphs and at 
exploring applications of one to the other.
\newpage
The main contributions of this work
\end{document}**