一项针对肥胖的健康教育干预试验中，对观察对象在干预前后体育锻炼时间的变化的评估属于（）

A.形成评价

B.过程评价

C.效应评价

D.总结评价

E.结局评价

The nurse is teaching a female client with osteoporosis about her prescribed diet. Which of the following foods is the best source of calcium（）

A. 1 cup of low-fat yogurt.

B. 1 cup of skim milk.

C. 1 oz of cheddar cheese.

D. 1 cup of ice cream.