The overweight adolescent client tells the nurse that he would like to lose weight and asks the nurse's opinion on how to accomplish his goal. Which of the following suggestions would be most appropriate

A．Exercising more often.

B．Severely limiting calorie intake.

C．Participating in an adolescent weight-reduction program.

D．Cutting clown on sweets and other snacks.

某多层砖房，每层层高均为2.9m，采用现浇钢筋混凝土楼、屋盖，纵、横墙共同承重，门洞宽度均为900mm，抗震设防烈度为8度，平面布置如下图所示。

当房屋总层数为六层时，满足《建筑抗震设计规范》（GB50011-2010）要求的构造柱数量的最小值，与下列何项数值最为接近？（）

A.18

B.21

C.25

D.29