先附上我的tex内容
\documentclass[12pt, a4paper]{article}
\usepackage{fancyhdr,yfonts, myself}
\usepackage{epsfig, booktabs, color}
\usepackage{amssymb, amsmath}
\usepackage{graphicx, threeparttable}
\usepackage{fancybox}
\usepackage{graphicx}
\usepackage{placeins}
%\usepackage{CJK}
\DeclareTextFontCommand{\textmyfont}{\myfont}
\usepackage{fontspec} %加这个就可以设定字体
\usepackage{xeCJK} %让中英文字体分开设置
\setCJKmainfont{标楷体} %设定中文为系统上的字型，而英文不去更动，使用原TeX字型
\XeTeXlinebreaklocale "zh" %这两行一定要加，中文才能自动换行
\XeTeXlinebreakskip = 0pt plus 1pt %这两行一定要加，中文才能自动换行
\usepackage{listings}
\lstloadlanguages{R}
\paperheight=25.5cm
\paperwidth=17.0cm
\topmargin=0.5cm \headheight=0cm \oddsidemargin=0.5cm \textwidth=16cm
\textheight=24cm
\pagestyle{fancy}
\lhead{\today}
\chead{The Discussion of The Correlation }
\rhead{R2}
\lfoot{} \cfoot{} \rfoot{\thepage\mbox{ }}
\renewcommand{\headrulewidth}{0.6pt} \renewcommand{\footrulewidth}{0.6pt}
\newcommand{\mbs}{\boldsymbol}
\usepackage{graphicx}
\newcommand{\widesim}[2][1.8]{\mathrel{\overset{#2}
{\text{\scalebox{#1}[1]{$\sim$}}}}} %此两行为同一行
\usepackage{multirow}
\definecolor{orange}{rgb}{1,0.65,0}
\definecolor{darkgreen}{rgb}{0, 0.4, 0}
\definecolor{deeppink1}{rgb}{1, 0.08, 0.6}
\definecolor{deeppink3}{rgb}{0.8, 0.06, 0.46}
\definecolor{purple}{rgb}{0.63, 0.13, 0.94}
\def\baselinestretch{1.5}
\def\tb#1#2{\mathop{#1\vphantom{\tiny}}\limits_{#2}}
\parindent=0pt
\begin{document}
Q1: What is the population parameter of Pearson correlation?\\
\end{document}