请问缺少的.sty文件如何安装？

zyzx

9 f% C) Z+ q3 ^3 Z
6 A5 `3 f# y4 T6 u* d' G' k在texworks里编译一些模版，总是出现“缺少.sty”文件的报错，比如：
“

! LaTeX Error: File `booktabs.sty' not found.

Type X to quit or <RETURN> to proceed,

or enter new name. (Default extension: sty)

Enter file name:

”

然后我从ctan上下载了booktabs文件夹，里面有这么几个文件：
: t) V. i/ W* S' y* T- p5 t% Wbooktabs.dtx, booktabs.sty, booktabs.pdf, booktabs.ins, copying, readme
; ^+ f/ k# M5 f/ ?' V其中readme里面有文件列表和安装方法：
6 m' ?& q( ]9 i, E0 W% ?“
/ K2 n, C1 s9 J0 q* vFILES IN DISTRIBUTION
=====================
   BASE DISTRIBUTION:
      README        This file.
      booktabs.ins  Package installation file.
      booktabs.dtx  Package source file.
      COPYING       GPL license file.
      booktabs.sty  Package style file. It was produced by executing "latex booktabs.ins".
   DOCUMENTATION:
! `7 N( w/ S7 p3 u" \      booktabs.pdf  User manual for booktabs package. It was produced by executing:
* D% V6 a: w# i& ?                       pdflatex booktabs.dtx
$ i3 a. q5 r5 x4 v8 Q                       pdflatex booktabs.dtx
                       makeindex -s gglo.ist -o booktabs.gls booktabs.glo
9 W, G+ B9 j  t3 A# z* H+ w                       makeindex -s gind.ist -o booktabs.ind booktabs.idx
                       pdflatex booktabs.dtx
8 w# a8 ]% {$ D6 ^" S- E                       pdflatex booktabs.dtx
BASIC INSTALLATION
2 I* O1 M6 z5 `$ t/ m% F* s! m====================
   The minimum requirement to use the package is the to have booktabs.sty in a directory where TeX can find it.
, H# A  C: s' I1 U' h   For a basic installation on a TDS compliant system, move the following files to the following directories:
     <texmf>/tex/latex/booktabs/
        booktabs.sty
     <texmf>/source/latex/booktabs/
% _: [3 L8 b7 d- `         booktabs.ins
         booktabs.dtx
3 z6 X8 z5 F$ U1 p4 s         COPY
3 S- ^8 P9 k. g2 o     <texmf>/doc/latex/booktabs/
! V# g" z/ N/ ~  r' o) M         README
$ x* k4 P( v, @, \         booktabs.pdf
- q0 n" c+ v7 n& z% N* [2 v( }”

1 P, F3 D' i, o) B/ a/ K我按上面的要求把各个文件放在了相应的位置（红字部分没有操作，因为不知道怎么操作），但是运行模版后仍然报错说找不到，怎么办呢？请大家帮忙！