OG 173 My New reflection

孔雀森林

173. Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

The answer is A

孔雀森林

Can I just explain it like this?

Premise:      Overweight-low rate   

                    Lose weight- fewer calories-Same rate

Conclusion: Same rate - Assumption - Regain weight

Assumption: more calories

Answer A: Few people continue to consume fewer calories= Most people consume more calories.

So A is the best answer.

bluevironika

我觉得gap是在这里的：

. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level.————〉 Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

中间有个assumption：the new thin persons have a higher metabolic rate than do normal people.

yukovan

conclusion: newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

To reach this conclusion, two requirements should be met.

1.their metabolism rate is lower than the normal people.(as mentioned in the question)

2.The amount of food they eat is not fewer than the that of the normal people.(as A states)

crystal2003

I can't understand it.

christy42728

up