现在我的章节是单独的文件，我该如何继续对我的章节/部分进行编号？

Question

我正在使用 LaTeX 撰写论文。最初，所有内容都在一个 .tex 文件中。但是，为了帮助编写某些章节，我将每个章节拆分为自己的 .tex 文件。不幸的是，现在我的章节和节编号完全错误，因为每个章节现在都是第 0 章（文档本质上是一整章），即第一章的第一小节是 0.1，然后下一小节从 0.4 开始。

这是我的主要 .tex 文件，

%\documentclass[12pt,oneside]{book} % for one-sided printing
\documentclass[12pt,twoside]{book} % for two-sided printing


% List of packages to be used
\usepackage{graphicx}
\graphicspath{{figures/}}
%\usepackage[nosectionbib,numberedbib]{apacite}
\usepackage[square,super,sort&compress]{natbib}
%\bibliographystyle{authordate1}
%\citestyle{nature}
\usepackage{url}
\usepackage{hyperref}
\usepackage{float}
\usepackage{textgreek}
\usepackage{chemformula}
\usepackage{siunitx}
\usepackage{caption}
\captionsetup[figure]{font=small}
\usepackage{rotating}
\DeclareUnicodeCharacter{0301}{\'{e}}
%\usepackage[square,numbers,sort&compress]{natbib}
\bibliographystyle{unsrtnat-initials}
\usepackage[utf8]{inputenc}
\usepackage{mathtools}
\usepackage{multirow}
\usepackage{rotating}
\usepackage{minipage-marginpar}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{enumitem}
\usepackage{lscape}
\usepackage{longtable}
\usepackage{ltablex}
\usepackage{xltabular}
\usepackage{booktabs}
\usepackage{sectsty}
\usepackage[myheadings]{fancyhdr}
\usepackage{adjustbox}



\usepgfplotslibrary{units}
\usepgfplotslibrary{groupplots}
\usepgfplotslibrary{statistics}
\pgfplotsset{compat=1.8}

\usetikzlibrary{
   automata,
   positioning,
   backgrounds,
   shapes.arrows,
   decorations.pathreplacing,
   arrows,
   shapes.misc,
   decorations.markings,
   calc,
   patterns,
   angles,
   quotes,
   pgfplots.groupplots
}

%\usetikzlibrary{plotmarks}
%\usetikzlibrary{external}
%\tikzexternalize[prefix=./tikzext/]

\pagestyle{fancy}
\fancyhead{} % clear the headers
\fancyhead[L]{\nouppercase{\leftmark}}
\renewcommand{\chaptermark}[1]{\markboth{\chaptername\ \thechapter\ -- #1}{}}

\newcommand{\uchapter}[1]{%
 \chapter*{#1}%
 \markboth{#1}{}%
 \addcontentsline{toc}{chapter}{#1}%
}

\usepackage{makecell} 
\renewcommand{\theadfont}{\bfseries}


% Title page information is here...% \renewcommand{\familydefault}{\sfdefault}

\begin{document}
\allsectionsfont{\sffamily}

%% Front matter
%
% This is where we do the title page, etc.
%

\frontmatter

% Standard-Form Title Pages
\maketitle

% Abstract and Keywords
\uchapter{Abstract}
   Type your abstract here.  Type your abstract here.  Type your abstract here.  Type your abstract here.   Type your abstract here.
   \section*{Keywords}
   Keyword 1; keyword 2; keyword 3.

% Acknowledgements
\uchapter{Acknowledgements}
The author would like to thank \dots

Keith and Charlene
% Table of Contents
\sstableofcontents

% List of Figures
\sslistoffigures

% List of Tables
\sslistoftables

 
 % Dont forget to set spacing - If not implemented spacing will be double.
\setstretch{1.25}

\input{Chapters/1_Intro.tex}
\input{Chapters/2_Structure.tex}
\input{Chapters/3_Osteoarthritis.tex}
\input{Chapters/4_Physicochemistry.tex}
\input{Chapters/5_AnalyticalTechniques.tex}
\input{Chapters/6_Summary.tex}
\input{Chapters/7_MandM.tex}
\input{Chapters/8_Results.tex}
\input{Chapters/9_Discussion.tex}
\input{Chapters/10_Conclusion.tex}


\bibliography{references2}

\appendix

\end{document}

我遗漏了什么或者我应该编辑什么以确保编号在整个文档中继续？

提前致谢。

编辑：示例章节如下：

\chapter{Summary of Literature, Aims and Objectives}

\subsection{Summary of Literature}
Summarise literature here

\subsection{Aims}

Insert aims here

\subsection{Objectives}

The following objectives were tested:

\begin{enumerate}
\item aim
\item aim
\end{enumerate}