如何修改

data aaa;
input x$;
cards;
95%CI
;
run;

%macro aaa(dset=,CurVar=);
%local dsid rc varnum value;
%let dsid=%sysfunc(open(&dset));
%let varnum=%sysfunc(varnum(&dsid,&CurVar));
%let rc=%sysfunc(fetchobs(&dsid,1));
%let value=%sysfunc(getvarc(&dsid,&varnum));
%mend;
%aaa(dset=aaa,CurVar=x);

如何修改macro中的内容，不出现warning，谢谢!

data aaa;
input x$;
cards;
95%CI
;
run;

%macro aaa(dset=,CurVar=);
%local dsid rc varnum value;
%let dsid=%sysfunc(open(&dset));
%let varnum=%sysfunc(varnum(&dsid,&CurVar));
%let rc=%sysfunc(fetchobs(&dsid,1));
%let value=%Qsysfunc(getvarc(&dsid,&varnum));
%mend;
%aaa(dset=aaa,CurVar=x);