conference paper撰写中，去会议官网下了latex包，一字未改，结果运行报错：citesort.sty找不到。
（大概是官方默认你有这个包，然而我没有hhh，自己库里有的请忽略）
解决方法：
新建一个文件，命名为citesort.sty，即后缀名为.sty。然后打开文件，将下面内容粘贴进去并保存。
%NAME: citesort.sty
% A replacement for \@citex which sorts citation numbers as well as
% compressing and allowing breaks. Based on cite.sty by Donald
% Arseneau.
%
% for use in LaTeX say, \documentstyle[...,citesort,...]{...}
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Allow, but strongly discourage, line breaks within a long
% series of citations. Compress lists of successive numbers
% to one number range, e.g., 5,6,7,8,9 --> 5--9. Compatible
% with versions of \@cite that use exponents.
% -- Donald Arseneau 1989
%
% Modified to sort the numbers so they come out in increasing order,
% regardless of the way they appear in the source. O(N^2) sort!
% Ian Green, CUED, 10-Dec-1991. Improvements to img@eng.cam.ac.uk
% please. Version 1\newcount\@minsofar
\newcount\@min
\newcount\@cite@temp
\def\@citex[#1]#2{%
\if@filesw \immediate \write \@auxout {\string \citation {#2}}\fi
\@tempcntb\m@ne \let\@h@ld\relax \def\@citea{}%
\@min\m@ne%
\@cite{%\@for \@citeb:=#2\do {\@ifundefined {b@\@citeb}%{\@h@ld\@citea\@tempcntb\m@ne{\bf ?}%\@warning {Citation `\@citeb ' on page \thepage \space undefined}}%
{\@minsofar\z@ \@for \@scan@cites:=#2\do {%\@ifundefined{b@\@scan@cites}%{\@cite@temp\m@ne}{\@cite@temp\number\csname b@\@scan@cites \endcsname \relax}%
\ifnum\@cite@temp > \@min% select the next one to list\ifnum\@minsofar = \z@\@minsofar\number\@cite@temp\edef\@scan@copy{\@scan@cites}\else\ifnum\@cite@temp < \@minsofar\@minsofar\number\@cite@temp\edef\@scan@copy{\@scan@cites}\fi\fi\fi}\@tempcnta\@min\ifnum\@minsofar > \z@ % some more\advance\@tempcnta\@ne\@min\@minsofar\ifnum\@tempcnta=\@minsofar % Number follows previous--hold on to it\ifx\@h@ld\relax\edef \@h@ld{\@citea\csname b@\@scan@copy\endcsname}%\else \edef\@h@ld{\ifmmode{-}\else--\fi\csname b@\@scan@copy\endcsname}%\fi\else \@h@ld\@citea\csname b@\@scan@copy\endcsname\let\@h@ld\relax\fi % no more
\fi}%
\def\@citea{,\penalty\@highpenalty\,}}\@h@ld}{#1}}% end of citesort.sty然后把该文件放入论文latex包所在的文件夹，运行，问题解决。