按照小白学sas里面输入的，第一次输入宏程序，点击运行没有输出值，日志指示把代码展示一遍，没有提示。求大神们给解答下，谢谢。
%let data=sasuser.xb;
%let id=id;
%macro outline(var=,low=,high=);
data outline;
set &data.(keep=&id. &var.);
length variable $20. reason $20.;
variable="&var.";
value=&var.;
if &var.<$low. and not missing(&var.) then do;
reason="过低";
output;
end;
else if &var.>&high. and not missing(&var.) then do;
reason="过高";
output;
end;
drop &var.;
proc append base=outliner1 data=outline;
run;
&mend outline;
%outline(var=height,low=150,high=200);
%outline(var=weight,low=40,high=100);
%outline(var=y1,low=1,high=5);
%outline(var=y2,low=1,high=5);
%outline(var=y3,low=1,high=5);
%outline(var=y4,low=1,high=5);
%outline(var=y5,low=1,high=5);
proc print data=outliner1;
run;