As more and more schools rush to put digital devices（数码设备）in the hands of every student, many parents are becoming increasingly concerned about the quality of their children's education. The promise of increased student academic（学业上的）achievement through the use of technology hasn't produced any significant results in the past 20 years.

    Researchers at the University of California Los Angeles conducted a study in 2014 to determine if the social skills of elementary students were blocked by screen time. Two groups of sixth grade students were compared. One group was sent to an outdoor camp for one week with no screen time, while the control group live life as normal. After one week, the students at camp had made significant improvements over their peers（同龄人）. The good news is that when we limit access to screen time and give children the opportunity to interact face to face, they quickly become better at reading the emotional state of others. The bad news is that we have a generation of children that struggle with this basic emotional intelligence skill.

    Too much screen time has been linked to childhood obesity, sleep disorders, behavior problems, and academic challenges. But is there a difference between schoolwork and entertainment media?

    When students are using technology for academic work they are more likely to be communicating with peers, working cooperatively, and developing other important skills. However, all these are impossible when students watch entertainment media. They just sit and watch!

    Parents have right to be concerned about their children's screen time at school, but they should begin by discussing the use of digital media at home. Some parents are continuously engaged in their own devices, responding to every ring of their phones, receiving and sending messages. How can they expect their children to do better?

    On August 25, Hurricane Harvey made landfall in Southern Texas. The storm lasted for days, pouring almost 52 inches of rain. The downpour has caused widespread flooding, forcing more than 32,000 people into shelters and damaging the city's water supply system.

    The only silver lining is that disasters like these seemed to unite people. While the number of organizations and individuals that have gone all out to assist the victims is too many to list, here are some highlights of the outpouring of support that has made headlines this past week.

    A week ago, NFI player JJ Watt set up a website with a goal to raise $200,000. Soon he has collected over $18 million, and the donations keep pouring in. The thrilled football star wants to ensure the money is used where needed, saying, “We're trying to make sure it goes directly to the people. So our first wave of operation is we'll have nine semi-trucks going out there and I will go straight into the communities and hand stuff out there.”

    Ordinary individuals are not shying away from helping either. Jim McIngvale, the owner of a furniture store, turned his two 100,000-square-foot warehouse into shelters. When asked if he was concerned about the furniture that was being used by those living there, he responded, “These people are nice. They're taking care of the furniture. Furniture's made to be sat on, slept on or laid on. It's just a product.”

    There are also many unsung heroes that are putting their lives at risk to help others. After discovering an elderly man trapped inside his truck, local people made a human chain through the dangerous water to drag him to safety.

    While there is not much anyone could have done to prevent the loss, people across the US are doing everything they can to help its people recover.

    There's a man in the habit of hitting me on the head with an umbrella. At first I couldn't stand it, now I'm used to it.

    I don't know his name. I know he's average in appearance, wears a gray suit, and has a common face. I met him five years ago one hot morning when I was sitting on a tree­shaded bench in Palermo Park, reading the paper. Suddenly I felt something touch my head. It was the very same man who now, as I'm writing, keeps hitting me, mechanically (机械地) and impassively, with an umbrella.

    On that occasion I turned around filled with anger. He just kept on hitting me. I asked him if he was crazy, he didn't even seem to hear me. Then I threatened to call a policeman. Calmly, cool as a cucumber, he stuck with his task. After a few moments of hesitation, and seeing that he was not about to change his attitude, I stood up and hit him on the nose. The man fell down, but he immediately got back on his feet, obviously with great effort, and without a word again began hitting me on the head with the umbrella. His nose was bleeding and, at that moment, I felt sorry for him. I felt regret for having hit him so hard. After all, the man wasn't exactly hitting me; he was merely tapping me lightly with his umbrella, not causing any pain at all. Of course, those taps were extremely bothersome. As we all know, when a fly lands on your forehead, you don't feel any pain; what you feel is annoyance. Well then, that umbrella was one huge fly that kept landing on my head time after time.

    Convinced that I was dealing with a madman, I tried to escape. But the man followed me, wordlessly continuing to hit me. So I began to run (I should point out that not many people run as fast as I do). He took off after me, trying to land a blow. The man was out of breath so that I thought, if I continued to force him to run at that speed, he would drop dead right then and there.

    In early November of 1942, my geology (地质学)class was supposed to go on a field trip to see the mica mine (云母矿). Although it rained, everyone showed up on time. I was the only girl in the class. We all fit into two cars.

    Near Deary, Mr. Tier, our teacher, went into a store to ask about the direction, while townsmen looked at us with curiosity. On the store owner's advice, we drove out into the hills for a few miles. Then we left the cars. We were afraid they would get stuck in the mud.

    Eventually, we located the mine near the top of the mountain. There was a very small hole, running about two or three hundred feet into the mountainside. The passage (通道) was so narrow that we could touch both sides with our hands, and not tall enough to allow us to stand up straight. The first boy held the torch; we took hold of the backs of each other's coats, in a line, and followed him in, ducking our heads. After getting in, we were disappointed because it was not the mine our teacher was looking for.

    The rain was coming down hard as we started back to the cars to go home. Back at Deary, we went into a drugstore and stood around its big heating stove to dry out. The clerk was a middle­aged lady. Seeing our entirely wet hair and clothes, she handed each of us a cup of hot water immediately and asked if there was anything wrong with any of us.

    Hiking eight miles in the rain had not reduced our interest at all. We all felt we had had a wonderful time, even if we didn't find the mine.

A person should eat right, and get some exercise, or he or she will look terrible in 25 years. And what if the person drinks and smokes? Even

1 . That's the message from the insurance company. The instrument, called "Future You", uses a digital camera and computer to compare a person's current image with his or her future 2 without changes in bad habits. 

"Smoking can 3 your skin," said Anna, a creative operation manager. "You can see what the results of the toxins(毒素) and the chemicals in 4 are." Along with the potentially 5 sight of one's older self, "Future You" offers science-based advice on what to eat, how much to exercise and other ways to 6 your health. But will it work? Too 7 to tell was the verdict(意见) of Anna. "I want to see some data!" she said. Generally, Anna said, men show 8 concern about their appearance than women. "Women say, 'That looks like my

9 on the screen,'" she said. "Men are more likely to say, 'Yeah, go ahead. Put it on the blog.'" The project was raised more than a year ago to improve the overall health of the people who are 10 of this company. In addition, the growth in the ranks of 11 customers would bring down the overall cost of health care. In coming weeks, two new ones will be 12 in locations such as the American Tobacco Campus and the Museum of Natural Science. If users agree, their information will be stored as secrets without names to create a database of good and bad 13 . 

The process is free and the response is not bad, at least according to Valencia Robertson, one of a line of people who waited to 14 the instrument on Thursday. "I'm good," Robertson said after 15 her future image. "It's not going to be a big difference." 

There's a useful concept from psychology that helps explain why good people do things that harm the environment: the false consensus effect. That's where we overvalue how acceptable and prevalent（普遍的） our own behavior is in society. Put simply, if you're doing something （even if you secretly know you probably shouldn't）, you're more likely to think plenty of other people do it too. What's more, you likely overestimate how much other people think that behavior is broadly OK.

This bias（偏见） allows people to justify socially unacceptable or illegal behaviors. Researchers have observed the false consensus effect in drug use and illegal hunting. More recently, conservationists are beginning to reveal how this effect contributes to environmental damage.

In Australia, people who admitted to poaching（偷猎） thought it was much more prevalent in society than it really was, and had higher estimates than fishers who obeyed the law. They also believed others viewed poaching as socially acceptable; however, in reality, more than 90% of fishers held the opposite view. The false consensus effect has also shown up in studies examining support for nuclear energy and offshore wind farms.

Just as concepts from psychology can help explain some forms of environmental damage, so too can they help address it. For example, research shows people are more likely to litter in areas where there's already a-lot of trash scattered around; so making sure the ground around a bin is not covered in rubbish may help.

Factual information on how other people think and behave can be very powerful. Energy companies have substantially reduced energy consumption simply by showing people how their electricity use compares to their neighbors. Encouragingly, stimulating people's natural desire for status has also been successful in getting people to "go green to be seen", or to publicly buy eco-friendly products.

As the research evidence shows, social norms can be a powerful force in encouraging and popularizing environmentally friendly behaviors. Perhaps you can do your bit by sharing this article!