While I will explain a bit about the science of stress and relaxation a little later simple way to think about it is that our body 's stress response works like a car alarm. Keep us safe by warning us of the presence of danger in our immediate environment.

But instead of warning us with a loud and annoying sound,our body alarm system lets us know that something is wrong by creating changes in our neurochemistry (神经化学).If you've ever expe­rienced pain in your stomach,periods of extreme anger, inability to focus or even insomnia (失眠),chances are your body was paying the price in those moments for the brain chemistry of stress.

So if it's so uncomfortable,why not just get rid of stress altogether?

This is not only impractical,it would be dangerous. Let's go back to the metaphor (比喻说法)of the car alarm. If the alarm is turned off altogether,the car is exposed to continual danger without there being any way of your knowing about it until it is too late. It would be like walking through the jungle without any fear signal in the presence of a poisonous snake or other dangerous animals — while it might feel “nice” to be so relaxed,your body actually needs the stress response not only to remind you of danger but also to offer extra adrenaline (肾上腺素) for your heart and extra blood and oxygen for your arms and legs.

However,if the car alarm goes off at any time,someone just looks at the car with a bit of an attitude,and it becomes equally useless. Not only do we stop paying attention to it,but it begins to drive us and everyone around us becomes a little bit crazy. In the case of our bodies,walking around in a constant state of alarm also has some pretty alarming health consequences,which we will explore in greater depth in the next chapter.

1.Our body's stress response is compared to a car alarm in that .

A. they work all the time B. they both give a signal

C. they work in the same way D. they both produce a sound

2.When our body alarm system works, .

A. we feel calm

B. we feel excited

B. some changes happen in our brain

D. some changes happen in our heart

3.What would happen if stress were got rid of completely?

A. We'11 be free of worries.

B. We'11 achieve a sense of safety.

C. We'11 reach a perfect state of mind.

D. We'11 fail to realize the possible danger.

4. What's the purpose of giving the example of walking through the Jungle in Paragraph 4?

A. To show the harm of stress.

B. To show the effect of stress.

C. To explain the function of stress response.

D. To explain the necessity of stress response.

根据短文内容,从短文后的七个选项中选出最佳选项填入空白处。选项中有两项为多余选项。

Weight loss is a hard topic. Lots of people aren’t satisfied with their present weight, but most people aren’t sure how to change it. You may want to look like the models or actors in magazines or on TV, but those goals might not be healthy or realistic for you. 1.

So what should you do about your weight control?

2. The best way to find out if you are at a healthy weight or if you need to lose or gain weight is to talk to a doctor or dietitian(营养学家). 3. If it turns out that you can benefit from weight loss then you can follow a few of the simple suggestions listed below to get started.

4. People who lose weight quickly by crash(速成的)dieting or other extreme measures usually gain back all of the pounds they lost, because they haven’t permanently changed their habits. Therefore, the best weight management ways are those that you can maintain for a lifetime.

Small changes are a lot easier to stick with than large ones. Try reducing the size of what you eat.

5. Once you have that down, start gradually introducing healthier foods and exercise into your life.

It’s a good idea to maintain a healthy weight because it’s just that: healthy.

A. Try giving up regular soda for a week

B. Try to pay attention as you eat and stop when you’re full.

C. Weight management is about long-term success.

D. Besides, no magical diet will make you look like someone else.

E. Being healthy is really about being at a weight that is right for you.

F. Changing from whole to nonfat or low-fat milk is also a good idea.

G. They will compare your weight with healthy standards and help you set goals.

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