The patient was warned _______ oily food after the operation.   [ ]

A. to eat not  

B. eating not  

C. not to eat  

D. not eating

若i、j为int类型，则以下程序段内循环体的总执行次数是 【12】 。 for(i=5;i;i--) for(j=0;j＜3;j++) { }