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  3. Beets and carrots are higher in sugar than many other vegetables. They are also

Beets and carrots are higher in sugar than many other vegetables. They are also

游客2024-01-12  79
问题 Beets and carrots are higher in sugar than many other vegetables. They are also high on the glycemic index, a scale that measures the rate at which a food increases blood sugar levels. But while nutritionists usually advise people to avoid high-sugar and high-glycemic-index foods, despite any nutritional benefits they may confer, they are not very concerned about the consumption of beets and carrots.
Which of the following, if true, would best explain the nutritionists’ lack of concern?
选项 A、Foods with added sugar are much higher in sugar, and have a larger effect on blood sugar levels, than do beets and carrots.
B、Most consumption of beets and carrots occurs in combination with higher-protein foods, whit h reduce blood sugar fluctuations.
C、Beets and carrots contain many nutrients, such as folate, beta-carotene, and vitamin C, of which many people fail to consume optimal quantities.
D、The glycemic index measures the extent to which a food increases blood sugar levels as compared to white bread, a food that is much less healthy than beets and carrots.
E、Nutritionists have only recently come to understand that a food’s effect on blood sugar levels is an important determinant of that food’s impact on a person’s health.
答案 B
解析 This question requires us to identify an explanation for nutritionists’ lack of concern regarding consumption of beets and carrots, despite the fact that they have higher sugar levels than many other vegetables and rate high on the glycemic index.
Normally, nutritionists would advise people against consuming foods that rate high on the glycemic index, whatever their other nutritional benefits.
To explain why nutritionists might hold such apparently conflicting positions, consider whether there might be something notable about the consumption of beets and carrots that makes their consumption an exception to the rule.
A    The fact that some foods may be even more problematic than beets and carrots does not explain nutritionists’ lack of concern about beets and carrots.
B    Correct. This provides a reason that consumption of beets and carrots may be, at least within the suggested context, exempt from nutritionists’ concern about consumption of high-sugar, high-glycemic-index foods. Remember, nutritionists’ general concern arises from the effects such foods have on those who consume them. If we suggest that beets and carrots are usually consumed with high-protein foods that counteract these unwanted effects, we have good reason not to be concerned about their consumption, at least in regard to their sugar level and glycemic index.
C    The nutritionists advise people to avoid foods high in sugar and high on the glycemic index despite any nutritional benefits they may confer. Therefore, the fact that beets and carrots have such nutritional benefits does not explain why nutritionists would not be concerned about consuming beets and carrots, given that they both high in sugar and rate high on the glycemic index.
D    Whatever measure the glycemic index is based on, we know that beets and carrots are high on that index. Furthermore, we know that nutritionists usually advise people to avoid high-sugar and high-glycemic-index foods, despite any nutritional benefits they may confer. Therefore, the fact that beets and carrots are more nutritious than w lite bread does not in any way explain the nutritionists’ lack of concern.
E    The fact that nutritionists have only recently become concerned about high-sugar and high-glycemic-level foods does not explain their particular lack of concern regarding beets and carrots.
The correct answer is B.
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