我正在写一份报告，页码只出现在每章的第一页。
我该怎么办？
\documentclass[12pt,a4paper]{report}
\setlength\textwidth{145mm}
\setlength\textheight{247mm}
\setlength\oddsidemargin{15mm}
\setlength\evensidemargin{15mm}
\setlength\topmargin{0mm}
\setlength\headsep{0mm}
\setlength\headheight{0mm}
\let\openright=\clearpage
\pagenumbering{arabic}
\pagestyle{headers},
%% Generate PDF/A-2u
\usepackage[a-2u]{pdfx}
%% Character encoding: usually latin2, cp1250 or utf8:
\usepackage[utf8]{inputenc}
%% Prefer Latin Modern fonts
\usepackage{lmodern}
%% Further useful packages (included in most LaTeX distributions)
\usepackage{amsmath} % extensions for typesetting of math
\usepackage{amsfonts} % math fonts
\usepackage{amsthm} % theorems, definitions, etc.
\usepackage{bbding} % various symbols (squares, asterisks, scissors, ...)
\usepackage{bm} % boldface symbols (\bm)
\usepackage{graphicx} % embedding of pictures
\usepackage{fancyvrb} % improved verbatim environment
\usepackage{natbib} % citation style AUTHOR (YEAR), or AUTHOR [NUMBER]
\usepackage[nottoc]{tocbibind} % makes sure that bibliography and the lists
% of figures/tables are included in the table
% of contents
\usepackage{dcolumn} % improved alignment of table columns
\usepackage{booktabs} % improved horizontal lines in tables
\usepackage{paralist} % improved enumerate and itemize
\hypersetup{unicode}
\hypersetup{breaklinks=true}
% Definitions of macros (see description inside)
\include{macros}
% Title page and various mandatory informational pages
\begin{document}
\include{title}
\tableofcontents
\input{acknowledgement.tex}
\input{abstract.tex}
\include{preface}
\include{chap01}
\include{chap02}
\include{chap03}
\include{bibliography}
\end{document}