The Science of Risk-Seeking

    Sometimes we decide that a little unnecessary danger is worth it because when we weigh the risk and the reward, the risk seems worth taking. {#blank#}1{#/blank#} Some of us enjoy activities that would surprise and scare the rest of us. Why? Experts say it may have to do with how our brains work.

    The reason why any of us take any risks at all might have to do with early humans. Risk-takers were better at hunting, fighting, or exploring. {#blank#}2{#/blank#} As the quality of risk-taking was passed from one generation to the next, humans ended up with a sense of adventure and a tolerance for risk.

    So why aren't we all jumping out of airplanes then? Well, even 200, 000 years ago, too much risk-taking could get one killed. A few daring survived, though, along with a few stay-in-the-cave types. As a result, humans developed a range of character types that still exists today. So maybe you love car racing, or maybe you hate it.{#blank#}3{#/blank#}

    No matter where you are on the risk-seeking range, scientists say that your willingness to take risks increases during your teenage years. {#blank#}4{#/blank#} To help you do that, your brain increases your hunger for new experiences. New experiences often mean taking some risks, so your brain raises your tolerance for risk as well.

    {#blank#}5{#/blank#} For the risk-seekers, a part of the brain related to pleasure becomes active, while for the rest of us, a part of the brain related to fear becomes active.

    As experts continue to study the science of risk-seeking, we'll continue to hit the mountains, the waves or the shallow end of the pool.

    Do you still remember the haze（雾霾）in the winter? So many people got terribly ill during or after the haze. {#blank#}1{#/blank#}Here is advice for you to protect yourself in hazy weather.

    Spend less time outdoors.This is the most effective way for self-protection in such bad weather.With PM2.5 increasing 103mg per cubic meter,residents will risk a 2.29% increase of death,which experts found out in 2012.If you have to get out,avoid riding bicycles.{#blank#}2{#/blank#}

    Close your windows.Experts advice residents to avoid opening windows at home.If you have to ,avoid the time when smog is at its densest（浓的）.{#blank#}3{#/blank#}Besides,you can keep plants with broad leaves at home to absorb dust,and use air purifiers（清洁器）.

    Smoke less.{#blank#}4{#/blank#}In hazy weather,smoking would be even more harmful.Smokers are advised to keep their distance from cigarettes before the weather gets better.

    {#blank#}5{#/blank#}For example ,wear special masks outside to avoid breathing in PM2.5.Then take off your coat after getting indoors and keep it away from your other clean clothes,Don't forget to wash your face,rinse（漱）your mouth,and clean your nasal cavity（鼻腔）to clean the particulate matters（颗粒物）that fall on you.Last but not least,keep off stimulating（刺激性）foods.

A.Wear masks.

B.Pay attention to other daily things.

C.Also avoid rush hours,when pollutants will be denser.

D.That's because haze does harm to the health of people.

E.Cigarettes could cause more particulate matters,which are included in PM2.5 .

F.Take more fruits and vegetables instead,which are good for lung,spleen（脾）and kidney（肾）.

G.For residents who use air-conditioner,make sure your apartment has enough oxygen indoors.

    Not all children want to listen to their parents. However, parents have been around for at least two decades or so longer than their kids. {#blank#}1{#/blank#} Here are four ways in which they might be right.

    {#blank#}2{#/blank#} People should want to grow and change with time in a good way. People who hang around with those who are not as smart as they are will stagnate (停滞). So try to surround yourself with people who are worth learning from.

    The more you learn, the less you really know. People tend to believe that they are right about everything before they've really learned anything about the world.{#blank#}3{#/blank#} This is largely due to contrast: people will realize how ignorant (无知) they were in the past after they've learned certain things, making them realize how much they've left to learn.

    Growing up too fast is truly bad.{#blank#}4{#/blank#} However, these are the years when you are going to be more protected from the cruel realities of adulthood. You should try to appreciate this aspect of this life stage without being concerned with pushing your development too hard.

    It is better to try and fail than fail to try. Children have to learn that failure is part of life.{#blank#}5{#/blank#} However, the sting (刺痛) of failure disappears gradually, and the regret about missed opportunities is going to sting far more for many adults. So don't stop going for certain goals because of a fear of failure.

A. Parents are wiser than you think.

B. It's hard enough for adults to accept.

C. Being around people who don't challenge you is a bad idea.

D. Your childhood years may not be the best years of your life.

E. They have some life experience, and it makes sense to listen to them.

F. People who bring out the best in others will reach their personal best.

G.  By the time they have, they'll realize how complicated (复杂) the world can be.

    What makes one person more intelligent than another? What makes one person a genius, like the brilliant Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result of where and how you live?{#blank#}1{#/blank#}

    We know, however, that just being born with a good mind is not enough. In some ways, the mind is like a leg or an arm muscle.{#blank#}2{#/blank#} Mental exercise is particularly important for young children. Many child psychologists think that parents should play with their children more often and give them problems to think about. {#blank#}3{#/blank#}38．__ If, on the other hand, children are left alone a great deal with nothing to do, they are more likely to become dull and unintelligent.

    {#blank#}4{#/blank#} According to some psychologists, if parents are always telling a child that he or she is a fool or an idiot, then the child is more likely to keep doing silly and foolish things. So it is probably better for parents to say very positive things to their children, such as “That was a very clever thing you did.” or “{#blank#}5{#/blank#}”.

A. A healthy body contributes to one's intelligence.

B. Parents should also be careful about what they say to young children.

C. What people want to express is like this.

D. The children are then more likely to grow up bright and intelligent.

E. It needs exercise.

F. You are such a smart child.

G. These are very old questions and the answers to them are still not clear.

    Generally, the skills and attitudes you form as a student will be especially important to your development. The following tips can help you become an active student.

    Don't be satisfied with yourself{#blank#}1{#/blank#}Leave no room for the average of the ordinary. If you can do good things, try hard to become better. If you have become better, try to become the best.

    Give yourself new challenges{#blank#}2{#/blank#}Any new things will give you the chance to understand yourself better. You should try anything. What you learn from these activities can be useful in the future.

    {#blank#}3{#/blank#}One reason why a student is not active may be that he has a defeated(挫败的) attitude. As much as possible, you should face each challenge with the willingness to succeed.

    Think over your mistakes, if there are any. Being active doesn't mean you will always be successful{#blank#}4{#/blank#} However, they will never succeed if they don't realize the meaning of failure.

    Keep a to-do list. This can serve as a reminder when a student becomes lazy{#blank#}5{#/blank#}

A. To achieve this, you have to desire to become excellent.

B. Have strong faith that you will succeed.

C. Try to take an active part in group discussions.

D. Don't be afraid to attend activities you wouldn't normally do.

E. There are students who would give up the moment they fail.

F. You can't be active if you don't know what is going on.

G. It can keep you on the right track and help you organize your tasks for the day.

    The UN has recognized the contributions of volunteers on Dec. 5, International Volunteer Day. Here, the four things are offered to consider before taking the leap into overseas volunteering.

    Choose your organization carefully

    {#blank#}1{#/blank#}volunteering may be a fundraising mechanism(筹资机制) for a development project. For others, volunteering is fundamental to their programs, and those serving take on professional roles in longer-term development.

    {#blank#}2{#/blank#}

    Volunteers want to help and make a difference, but most know this isn't a purely selfless act. You will learn new skills, broaden your horizons and come to better understand yourself and the world. {#blank#}3{#/blank#} Reflect on your motivations. You want to help reduce global poverty or protect the natural world, but what else? Have you always wanted to travel, but not as a tourist? Work with kids? When you understand your motivations, you'll be in a better position to choose the option that is right for you.

    Work alongside the local community

    Often times, travelers volunteer in isolation(隔离) from the local community in which they are working in. {#blank#}4{#/blank#} This enables you to ensure you are committing to a project that promotes long term and sustainable change.

    A volunteer trip is just the beginning

    {#blank#}5{#/blank#} Further ignite(点燃) the global change maker in you by taking your experience one step further when you return home. Spread the message of your transformative experience to others, helping to spark the change within them.

A. And that's all OK.

B. Know why you're going.

C. Don't assume you know it all.

D. Communities always welcome volunteers.

E. Volunteer travel is a life-changing experience.

F. Some organizations require you to pay your own way, and often include a fee.

G. Make sure to travel with organizations that have strong partnerships with local communities.