1）沉着冷静，遇事不惊

2）.室内要找到遮蔽物，如：桌子下面

3）室外应远离建筑物，去到开阔的地方

注意：1）词数100左右； 2）可以适当增加细节，以使行文连贯。

What comes first: the optimism or the good health?

    Optimism, defined as the general expectation that the future will be favorable, could provide ways to improve health, some researchers believe. But scientists remain unsure if optimism goes ahead of health improvements, or vice versa.

    A recent study suggests that most people can't help but to think optimistically. This study was conducted by Ed O'Brien, a social psychologist at the University of Michigan in Ann Arbor. The findings suggest that people have a natural tendency to think positively about their future.

    Participants were asked to create a list of imaginary personal experiences that would make them happy or unhappy over the course of the next year. They then ranked how difficult it was to plan that list and how happy they believed they would be in the future overall. The easier it was for people to think of positive future experiences, the happier they imagined they would be. However, there was no relationship between easily developing negative future experiences and expecting to be unhappy as a result.

    O'Brien concluded that people seem to discount the possibility that future negative events will make them happy overall, suggesting that optimism might come more naturally. "We're not as used to thinking about the future in terms of things that are going to go wrong." O'Brien's study is one of many to find that people are consistently optimistic about their future, predicting pleasant experiences and discounting unpleasant ones. If optimism may lead to better health and people generally tend to think optimistically, what does this mean for the connection between mental and physical health? "If we can make sure that optimism comes before healthy states, we might be able to involve and improve people's optimism," Boehm explained. However, it's difficult to determine what comes first: the optimism or the good health.

    Are you working with your computer routinely either as an office employee or a game lover? Are your eyes dry, watery, blurry, seeing double or sensitive to light? If your answer is a "yes", you are likely one of many people today who suffer from digital eyestrain, also called computer-vision syndrome. What on earth is this syndrome coming from? What can we do to deal with this problem?

    Eyestrain is often related to the amount of exposure to screens, the distance from eyes to screens and the use of multiple screens simultaneously. However, studies have also shown that the blue light produced by digital devices today reaches further into the eyes than other kinds of light. This light actually assists attention during the day but can result in interrupted sleep patterns at night.

    Years of scientific researches indicate that eyestrain isn't necessarily an unavoidable problem for those who deal with computer work in the daily base. There are ways you can adopt which can overcome the problem considerably. To begin with, your computer screen should be high-resolution (高分辨率), at least 50 centimeters wide diagonally and may require a screen filter to decrease reflections. Also, be aware that "computer glasses", which cut down glare and blue light，are available.

    Besides, to reduce your risk for computer-vision syndrome, take frequent breaks during your computer workday. Many workers take only two 15-minute breaks from their computer throughout their day. According to a recent study, eyestrain are significantly reduced when computer workers take four additional five-minute "mini-breaks" throughout their workday. Finally, many of us fall into bad habits while using digital screens, which only worsen the effects of eyestrain. While viewing digital screens, many people blink (眨眼) one third less often than they usually do. Place a reminder on your computer to "blink" so that your eyes don't dry out.

    Whether you're looking for a quick hotel in the city or a isolated resort in the tropics, where you choose to stay can make or break your vacation experience. But even the most seasoned travelers may not know the difference between the two main types of homes-away-from-home. Besides their first letter, is there any real difference between hotels and motels?

    These two types of lodging(宾馆) have the same basic purpose­a place for travelers to sleep­but there are plenty of features that set them apart. For instance, they came to be for different reasons, and at very different times. The word "hotel" dates back to the 1600s and comes from a French word, hotel. That word, just like the English one, referred to a place that provides lodging, meals, entertainment, and other services to travelers.

    Motels, on the other hand, are a much more recent­and pretty much exclusively American­lodging option. This word dates back to the 1920s and combines the words "hotel" and "motor." As America's major highway system developed, so did motels, filling the need for roadside stops for motorists traveling cross-country.

    There are also some smaller differences that can help you figure out which type of place you're in. Hotels tend to be built for longer stays, while motels are geared more for one- or two-night stops along a journey. Because of this, hotels are much more likely to have offerings like lounges, gyms, and entertainment.

    So, in the end, it comes down to what you want from your trip and from your lodging. Want the place you stay to be just as much a part of your travel experience as anything else? Opt for a hotel. Just need a place to pop in and out of to shower and sleep? A motel might be the better choice.

Teens' Sleep Shortage

    Most teens need about 8 to more than 9 hours of sleep each night. The right amount of sleep is essential for anyone who wants to do well in tests or sports. And lack of sleep affects everything from a person's ability to pay attention in class to his or her mood. It also damages teens' ability to do their best in athletics. Unfortunately, research shows that many teens don't get enough sleep, and more than 20% of high school students fall asleep in class.

    Until recently, teens were often blamed for staying up late, oversleeping for school, and falling asleep in class. But recent studies show that teens' sleep patterns actually differ from those of adults or kids. These studies show that during the teen years, the body's biological clock is temporarily reset, telling a person to fall asleep later and wake up later. This change might arise from the fact that the brain hormone melatonin (褪黑素) is produced later at night for teens than it is for kids and adults. This can make it harder for teens to fall asleep early.

    These changes in the body's biological clock are in line with a time when they're busier than ever. For most teens, the pressure to do well in school is heavier than when they were kids, and it's harder to get by without studying hard. And teens also have other time demands — everything from sports and other extracurricular(课程外的) activities to fitting in a part-time job to save money for college.

    Early start time in some schools may also play a role in this sleep shortage. Teens who fall asleep after midnight may still have to get up early for school, meaning that they may only squeeze in 6 or 7 hours of sleep a night. A couple hours of missed sleep a night may not seem like a big deal, but can create a noticeable sleep shortage over time

    Tired of all the pushing in supermarkets? Fed up with waiting in endless lines to pay for what you have bought? Angry at wasting time in traffic jams only to find no parking spaces when you eventually arrive at the store? If this is you, then online shopping is the answer to your dreams of trouble-free shopping, or is it?

    Online shopping brings its own challenges. Here are a few things to bear in mind when browsing (浏览) various websites. The claim (声称) made by online sites is that shopping online is a safe and secure way to make purchases. The evidence challenges this. In any case, you only have to be the victim of fraud (欺骗) once to experience all the problems that come with this form of deceiving. Use only sites that have a trusted history and an excellent reputation.

    Another problem is that the appearance of items in reality is often quite different from what you see on your computer screen. This might not be a problem if you are buying washing powder but could be a major disappointment when that beautiful blue dress you ordered turns up in green. Also, product descriptions are sometimes simply untrue! Perhaps the wisest plan is to purchase items where design and colour are not essential to customer satisfaction.

    Some even argue that online shopping indirectly contributes to global warming. Yes, your car can stay parked but how are online goods delivered? Often by some large vans pouring out carbon monoxide(一氧化碳) and adding to our already desperate traffic problems. You are also by now becoming increasingly irritated(烦恼的) by the fact that the delivery is late and you have wasted the leave from work to receive it!