None of the women were told what to eat or how much to exercise, but they all were interiewed about their diets and physical actiity leels when they entered the study between 1991 and 2000.

• 没有人告诉这些女性应该吃什么或应该做多大量的运动，但当她们在1991年至2000年间进入这一研究后，研究者对她们的饮食和体育锻炼情况进行了调查。