A new study by researchers at the University of Oxford has suggested catching COVID-19 may lead to changes to the brain.
It is as yet unclear if the changes are lasting，but Magnetic Resonance Imaging（MRI）scans have shown that even in mild（輕癥）cases of infection （感染），patients' brains have become a little smaller.The lost tissues（組織）have influenced areas of the brain connected to memory and the sense of smell.
"We were looking at small infection，so to see that we could really see some differences in their brain and how much their brain had changed，"Gwenaelle Douaud，a professor the University of Oxford，told the BBC.
The findings of the team' s study are published in the journal Nature.It got help from the findings of an early long-term research project looking at the health of half a million people that the UK Biobank has been carrying out for more than ten years.
This allowed researchers to compare people' s health before and after infection.It looked at 401 participants（參與者）who had been infected，about four and a half months after their infection，which in 96 percent of cases was seen as mild，and compared their overall health with 384 people who had not been infected.
Among the differences noted were brain shrinkage（腦萎縮）of up to 2 percent．Another part of the study reported that people who had tested positive（陽性）needed more time to complete many different cognitive tests，with researchers explaining "an important，harmful influence connected to COVID-19" .
It may also shine some light on the topic of long COVID，which some patients have experienced long after early infection.
（1）What's NOT the possible change after catching COVID-19 in the passage？ DD
A．Patients'"brains will become a little smaller.
B．Patients will lose their tissues gradually.
C．Patients will have a worse memory.
D．Patients will have a better sense of smell.
（2）Who did the study to find the changes in brain？ AA
A．Researchers at the University of Oxford.
B．Patients who caught the COVID-19.
C．Researchers at the UK Biobank.
D．Workers in the journal Nature.
（3）What can we learn from the passage？ AA
A．The present findings got help from the early one.
B．Most of the cases in the study were regarded as serious ones.
C．People tested positive needed less time to complete cognitive tests.
D．The lasting changes brought by COVID-19 were proved clearly.
（4）What's the passage mainly about？ BB
A．Solutions to avoid the influence of COVID-19.
B．Recent findings connected to COVID-19.
C．Complaints about the bad result of COVID-19.
D．Differences between COVID-19 and other diseases.
【答案】D；A；A；B
【解答】
【點評】
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發(fā)布：2024/4/20 14:35:0組卷：0引用：1難度：0.5
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