According to the CDC，insufficient sleep is a public health problem，with over a third of adult sin the U.S.getting less than the recommended seven to eight hours per night.（1）DD
Your brain doesn't work as well.
When you don't get adequate sleep，it takes a toll on your brain to function."MRI imaging shows lack of sleep reduces blood flow to areas of the brain that control higher level thought processes，" says Richard Shane，a behavioral sleep specialist."It impairs your problem-solving abilities，and decreases constructive thinking skills and logical reasoning."
（2）BB
You've probably noticed that you wake up "on the wrong side of the bed" if you haven't got enough shut-eye."Sleep deprivation affects mood，" Breus says."It makes you see everything in a more negative light because your emotions are more volatile when sleep deprived."
Your heart could suffer.
（3）EEBut what happens is that every system in your body is affected，causing long-term effects on your cardiovascular health，including your risk for high blood pressure，heart attack，and stroke.
Your skin looks haggard.
Turns out，"beauty sleep" is a real thing，studies show.（4）GG Research has shown that people who lack sleep are considered less attractive.
You gain weight.
Dr.Shah says two specific hormones that regulate eating behavior are affected.Ghrelin，which increases appetite，is high in people with sleep deprivation.（5）FF
In order to get better sleep，experts recommend going to bed and waking up at the same time every day exercising earlier in the day，getting 15 minutes of sunlight to set your body clock，avoiding screen time before bed，and keeping your bedroom dark.
A.You become forgetful.
B.You feel annoyed or burst into anger easily.
C.Your heart may suffer if you often sleep little in the long term.
D.The following are the harms of lack of sleep that you should know.
E.You may think the only effect of sleep deprivation is that you're really tired.
F.On the other hand，levels of leptin，which lowers appetite，is low in sleep-deprived people.
G.Sleep plays an important role in the generation of cells，which is important for healing and in skin problems.
【考點(diǎn)】健康．
【答案】D；B；E；G；F
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：9引用：3難度：0.6
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Here are 3 simple things that will help you improve your memory and keep it going strong into your old age．
Get plenty of exercise and rest．
Exercise isn't just good for your physical body，but it is also good for your brain．Exercise increases the amount of oxygen that gets to your brain．（2）When you exercise，your brain produces certain chemicals that help to protect your brain cells．Rest is also an important part of improving your memory．Studies show that key memory improvement happens when you are in those deep stages of sleep，so go to bed early every night．
Have a good laugh as often as you can．
Not only is laughter good for the soul，it is also good for the brain and can help improve your memory．
（3）This helps you to learn more and be more creative．So，go ahead and belt out a good laugh．Not only will others join you，but you will feel much better after doing it．
（4）
Stress has a bad effect on your body，especially the brain．If you let stress stay，it can destroy your brain cells and cause damage to the part of the brain responsible for creating new memories and remembering old ones．So，stay away from stress．It's bad for you．If you are feeling a little stressed，go outside and take a little walk around． （5）
A．Avoid stress．
B．Change your behavior．
C．It also helps to reduce memory loss
D．This will make you feel ten times better．
E．When you laugh you excite many areas of your brain．
F．The health of your brain directly shows how strong your memory is．
G．The human brain is like a muscle and can be trained．發(fā)布：2025/1/1 17:30:2組卷：0引用：2難度：0.5 -
2．Winter is often bitterly cold，which often makes us stay indoors more instead of heading out to exercise．Worse still，there are many viruses doing their best to make you sick．And sneezing，coughing and nose blowing make the rooms a habitat for viruses． （1）
．Touching a doorknob or shaking a hand may make you get sick．Although it may sound terrible，there are still some things you can do to avoid viruses．Here are several simple tips to stay healthy in winters．
Wash your hands
You pick up viruses everywhere and they live on your hands，so wash your hands and do it often．（2）But if that's not available，use an alcohol-based hand sanitizer （消毒殺菌劑）．
（3）．Avoid touching your eyes，nose and mouth with your hands．That's one way viruses can get into your body．
Get the flu shot （疫苗）
（4），but getting the flu shot lowers your chances of getting the flu．For example，getting the flu shot last year resulted in a 34% lower risk of coming down with the flu．
Avoid sick people
（5）．Viruses spread very easily through the air，so keep at least six feet between you and the sneezing，sniffling and coughing person．
A．It's no guarantee
B．Take care of your face
C．Keep your hands away from your face
D．The best way is to use regular soap and water
E．It is easy for viruses to spread from person to person
F．If someone around you is sick，then keep your distance
G．Because there are always some unexpected things in life發(fā)布：2025/1/1 15:0:2組卷：13引用：4難度：0.5 -
3．What is cross country running？Cross country is an outdoor endurance（耐久性）sport that can be mentally challenging and fun.（1）
You're not only putting one foot in front of the other；you're also thinking ahead to barriers and changes in the trail or course.
（2）However，before you begin training and racing，you should be aware of potential injuries and how to avoid them.How can you prevent cross country running injuries？The best ways for outdoor runners to stay healthy include the following running tips：
Stretch daily.For all runners and athletes，a regular stretching routine is an important part of conditioning.（3）
Warm up and cool down.Muscles and tendons（跟腱）are less likely to overstretch or tear if they've been properly prepared for running and racing.High-intensity workouts require more prep and post-workout cool down than low-impact activities.
Wear the right shoes.Make sure your shoes fit properly and that they are neither too tight-fitting nor too loose.（4）
Eat and drink enough.Competitive distance runners like to keep their weight low.However，consuming too few calories can harm your body，especially if you're a girl or woman subject to eating disorders.（5）It's effective to prevent injury and heat illness.Remember that especially in full sun or in humid regions of the state，you particularly tend to have heat stroke.Drink plenty of water before and after running.
A.Cross country running is a sport requiring money.
B.Tie double-knots to prevent tripping over undone laces.
C.It's mostly very safe in comparison to other team sports.
D.Have a well-balanced diet and be sure to stay well-hydrated.
E.You may encounter unexpected，non-natural barriers.
F.It is needed to keep your bones，joints，and muscles healthy.
G.This type of running and racing has both a physical and psychological role.發(fā)布：2025/1/1 15:30:1組卷：3引用：2難度：0.5
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