Question

【題目】A Diet Without Enough Protein Can Cause Depression

Depression is a condition so common. 【1】 The World Health Organization (WHO) calls it “a leading cause of disability.” Difficulty in falling asleep, loss of appetite, and loss of ability to concentrate are just a few of the other effects of depression. While life events such as the loss of a spouse or a job may create a happening of depression, many cases come from within, such as people’s diet.

As is reported, both before and during a happening of depression, those with the condition show a “poor appetite”. 【2】 On the other hand, depression may be closely related to protein. Many cases of depression happen to those who don’t eat properly, which then result in lack of protein taken into the body.

【3】 It all comes down to amino acids (氨基酸). Proteins are made up of amino acids. Both the human brain and nervous system use amino acids as a substance that creates a signal from one brain cell to another or one nerve cell to another. With them communication between the cells becomes possible.

【4】 But eight of them, the “essential” ones for communication between the brain cells, must be eaten in one’s diet. So a diet which is lacking in protein lessens the signal being sent from one brain cell to the next during a thought. The process can lead to twisted signals, which can not only lead to depression, but also aggression. 【5】

A. It happens with aggression.

B. It may lead to serious effects.

C. But how lack of protein occurs?

D. There are 20 different amino acids.

E. But what does protein have to do with depression?

F. The poor appetite itself can create a depressed mood.

G. This is why depression can often express itself as anger or aggression.

Answer 1

【答案】

【1】B

【2】F

【3】E

【4】D

【5】G

【解析】

這是一篇說(shuō)明文。文章介紹的是飲食中缺乏足夠的蛋白質(zhì)會(huì)導(dǎo)致抑郁。

【1】根據(jù)下文提示：世界衛(wèi)生組織(WHO)稱(chēng)其為“導(dǎo)致殘疾的主要原因”。承接下文，B. It may lead to serious effects.（它可能會(huì)導(dǎo)致嚴(yán)重的后果。）切題。故選B。

【2】根據(jù)上文提示：據(jù)報(bào)道，在抑郁癥發(fā)生之前和發(fā)生期間，這些人都表現(xiàn)出“食欲不振”。承接上文，F項(xiàng) The poor appetite itself can create a depressed mood.（食欲不振本身就會(huì)使人情緒低落。）切題。故選F。

【3】下文提示：一切都?xì)w結(jié)于氨基酸。承接下文，E項(xiàng) But what does protein have to do with depression?（但是蛋白質(zhì)和抑郁癥有什么關(guān)系呢?）切題。故選E。

【4】下文提示：但其中的八種，即腦細(xì)胞之間交流的“必需”物質(zhì)，必須在日常飲食中食用。承接下文，D項(xiàng)There are 20 different amino acids.（有20種不同的氨基酸。）切題。下文中的but其轉(zhuǎn)折作用，將上下文連在一起。故選D。

【5】上文提示“這個(gè)過(guò)程會(huì)導(dǎo)致扭曲的信號(hào)，這不僅會(huì)導(dǎo)致抑郁，還會(huì)導(dǎo)致攻擊性。”承接上文，G項(xiàng)This is why depression can often express itself as anger or aggression.（這就是為什么抑郁癥經(jīng)常以憤怒或攻擊性的形式表現(xiàn)出來(lái)。）切題。故選G。