假如：
set ab=D:\123
set i=a
set j=b
set ij=%i%%j%
echo %%ij%%
输出是%ab%
但是我想要套出D:\123，要怎么做呢

cls&echo off
set #=Any question&set _=WX&set $=Q&set/az=0x53b7e0b4
title %#% +%$%%$%/%_% %z%
set ab=D:\123
set i=a
set j=b
set ij=%i%%j%
call echo;%%%ij%%%
setlocal enabledelayedexpansion
echo;!%ij%!
endlocal
echo;%#% +%$%%$%/%_% %z%
pause
exit