Questions 26 to 35 are based on the following passage.
Eating fruits and vegetables has proved helpful in preventing various chronic ( 慢性的) illnesses.Does that mean the more the better?
The data from 16 studies were analyzed, 26 morethan 833,234 adults. The span of the studies 27 from 5 to 26 years.56,423 adults participating in the studies died overall, the more fruits and vegetables people 28 , the less likely they were to have died during the study period. For every 29 serving eaten, up to foura day, the chance of dying for any reason decreased by 5 percent. Those who atefour servings a day were 24 percent less 30 to have died than thosewho ate none at all. However, eating five or more daily servings indicated noadded 31 Higher consumption of fruits and vegetables also showed 32 no effect on the probability of dying from cancer.
Although the recommendation of the 33 serving varies with age, health statusand other factors, most adults are called for to fill half their plate withfruits and vegetables. The food pyramid(金字塔) model 34 that adults eat three to five servings of vegetables and two to four servings of fruits daily.
However,the study did not determine whether certain fruits or vegetables were more orless beneficial than others. It indeed inferred that there's a(n) 35 to how much fruit and vegetables are good for you.