阅读下面短文,完成短文后的问题。
A recent study on humans suggests clear Western high-fat, high-sugar “junk food” can quickly break your brain’s appetite (胃口) control.
The researchers let the young enjoy the delicious cookies, tasty ice-creams and similarly rich foods for a week long. They did the research in Australia. They found young and healthy volunteers scored worse on memory tests. At the same time, they also had a greater wish for junk food, even when they were already full.
The findings suggest something is wrong in the hippocampus (海马体). What is hippocampus? It is an area of the brain. It can support memory and help to control appetite. When we are full, the hippocampus is thought to make our memories of delicious food less active, cutting down our appetite. When there is something wrong in this area, this control can be badly broken.
Over the years, further research on the mice has found the role of the hippocampus is easily affected by “junk food”. But this has only recently been found in young and healthy humans.
In 2017, after a week of Western-style breakfasts, researchers found volunteers performed worse on learning and memory tests. They clearly depend on the hippocampus.
Now, in this latest study the team has found that not only do such high-fat, high-sugar foods impair (损害) memory in humans, they also appear to directly affect our ability to control our appetite.
51. Please list two behaviors of the young men after eating junk food for a week.
______________________________________________________________________52. What role does “hippocampus” play in our body?
______________________________________________________________________53. Please translate the underlined sentence into Chinese.
______________________________________________________________________54. What can affect our ability to control our appetite according to the passage?
______________________________________________________________________55. What’s the writer’s purpose in writing the passage?
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