我是 LaTeX 的新手，所以如果这个问题听起来很愚蠢，请原谅。
我正在尝试使用以下模板，但是当我尝试编译它时遇到了一个问题：我需要使用xelatex一些包，因为我需要特殊字符，但是当我用它编译时xelatex出现以下错误：
!Package pdftex.def Error: Option 'pdftex' requires pdfTeX
但是，我不明白我的模板在哪里使用了 pdftex 选项。它是哪个包？还是我遗漏了什么？
% This one will format for two-sided binding (ie left and right pages have mirror margins; blank pages inserted where needed):
\documentclass[a4paper,twoside]{ociamthesis}
% This adds a "DRAFT" footer to every normal page. (The first page of each chapter is not a "normal" page.)
\fancyfoot[C]{\emph{DRAFT Printed on \today}}
% This highlights (in blue) corrections marked with (for words) \mccorrect{blah} or (for whole
% paragraphs) \begin{mccorrection} . . . \end{mccorrection}. This can be useful for sending a PDF of
% your corrected thesis to your examiners for review. Turn it off, and the blue disappears.
\correctionstrue
% The humanities-type option: author-year in-text citation with an alphabetical works cited.
\usepackage[style=authoryear, sorting=nyt, backend=biber, maxcitenames=2, useprefix, doi=false, isbn=false]{biblatex}
\newcommand*{\bibtitle}{Works Cited}
%special characters
\usepackage[T1]{fontenc}
% This makes the bibliography left-aligned (not 'justified') and slightly smaller font.
\renewcommand*{\bibfont}{\raggedright\small}
% Change this to the name of your .bib file (usually exported from a citation manager like Zotero or EndNote).
\addbibresource{references.bib}
%float package
\usepackage{float}
% package for lists
\usepackage[ampersand]{easylist}
\ListProperties(Hide=100, Hang=true, Progressive=3ex, Style*=-- ,
Style2*=$\bullet$ ,Style3*=$\circ$ ,Style4*=\tiny$\blacksquare$ )
%package for columns
\usepackage{multicol}
%varia
\usepackage{fontspec}
\usepackage{polyglossia} % English language/hyphenation
\usepackage{sectsty} % Allows customizing section commands
%%%%% THE ACTUAL DOCUMENT STARTS HERE
\begin{document}
…
\include{text/ch1-intro}
…
\end{document}