The Pew Internet Project did the survey with the National Writing Project. Judy Buchanan is the vice director of the National Writing Project and a co-author of the report. Ms. Buchanan says digital research tools are helping students learn more and faster. “Teachers really favor these tools because they are ways to make some of the learning exciting and engaging. Young people favor these tools. The goal is to really help them become creators of meaningful content, and not just sort of consumers.”

    But one problem the survey found is that many students lack digital literacy. They trust too much of the information they find on the Internet. Judy says these students haven't developed the skills to determine the quality of online information.“It's something that really has to be taught and paid attention to. Because in a world in which things happen quickly, you do need to step back, reflect and analyze the information you have.”

    Another problem is blamed on something that might not seem like a problem at all: being able to quickly find information online. Teachers say the result is a reduction in the desire and ability of their students to work hard to find answers. They say students are overly dependent on search engines and do not make enough use of printed books or research libraries.

    Many teachers are also concerned that the Internet makes it easy for students to copy work done by others instead of using their own abilities.

    Being less than perfectly well-dressed in a business setting can result in a feeling of great discomfort that may well require treatment to eliminate. And the sad truth is that “clothing mismatches” on the job can ruin the day of the person who is wearing the inappropriate attire(着装)—and the people with whom he or she comes in contact.

    Offices vary when it comes to dress codes. Some businesses have very high standards for their employees and set strict guidelines for office attire, while others maintain a more relaxed attitude. However, it is always important to remember that no matter what your company's attitude is regarding what you wear, you are working in a business environment and you should dress properly. Certain items may be more appropriate for evening wear than for a business meeting, just as shorts and a T-shirt are better suited for the beach than for an office environment. Your attire should reflect both your environment and your position. A senior vice president has a different image to maintain than that of a secretary or sales assistant. Like it or not, you will be judged by your personal appearance.

    This is never more apparent than on “dress-down days”, when what you wear can say more about you than any business suit ever could. In fact, people will pay more attention to what you wear on dress-down days than on “business professional ” days. Thus, when dressing in “business casual” clothes, try to put some good taste into your wardrobe choices, recognize that the “real” definition of business casual is to dress just one notch(等级) down from what you would normally wear of business-professional attire days.

    Remember, there are borders between your career and our social life. You should dress one way for play and another way when you mean business. Always ask yourself where you are going and how other people will be dressed when you get there. Is the final destination the opera, the beach, or the office? Dress properly and you will discover the truth in the principle that clothes make the man—and the woman. When in doubt, always misjudge on the side of dressing slightly more traditionally than the situation demands.

Research shows that isolation(隔绝，孤立)is bad for us and associated with certain diseases including depression, high blood pressure and heart disease. Yet teenagers seek isolation by using the device of our times—a screen, screens of all kinds. However, in whatever form, screens are addictive, and addictive from an early age. Research has shown that given the chance, six-month-old babies prefer screens to real human faces.

    Hand in hand with this addiction to screens, we are seeing an explosion of teenage mental health problems. Social media claims to be inclusive, keeping you connected. But it's not. It isolates you from real people. Screens have even been described as being poisonous for teenagers.

    Psychologist Jean Twenge, a professor at San Diego State University, believes today's teenagers are “on the edge” of a major mental health crisis and requestes, “do anything that doesn't involve a screen”. The problem is, she claims, children born between 1995 and 2012 have grown up with a smart phone in their hands, and it has “changed every aspect” of their lives. The number of teenagers who actually see their friends frequently has dropped by more than 40% since 2000. In 2015, only 56% of 17-year-old went on a date, down from 85%. Modern teenagers are slower to learn to drive, or earn money and spend more time at home. They're “on their phone, in their room, alone and often depressed”, she says.

    Some critics, however, say we should encourage our children to spend more time online. Robert Hannigan, former director of GCHQ, said in August that Britain is badly short of engineers and computer scientists, and urged children to develop cyber skill to compete in the digital economy.

    I' m not the first to say that social media is inferior to real human contact, and harms mental health. Studies show teens who spend three hours a day online are 35% more likely to suicide(自杀).

    The suicide rate among girls aged 12 to 14 has more than doubled in a decade.

    Do you like to show off your expensive items? You could find yourself without friends! Scientists prove that expensive status symbols make you look less socially attractive.

    Items such as a fancy car and a Rolex watch are often thought to increase our social standing(地位) and often come with a high price tag(标签).According to the latest research, however, it has the opposite effect and people would prefer to be friends with someone who places less value on material objects.

    "Often we think that status symbols will make us look more socially attractive to others," says Stephen Garcia, the study's leading author from the University of Michigan. He adds, "However, our research suggests that these status signals actually make us look less socially attractive.

    The researchers conducted six studies which assessed how people presented themselves and how people viewed strangers. People who chose to wear higher status items tended to get a negative response, but people wanted to be friends with people who preferred lower status symbols.

    The study took the role of the luxury(奢侈) item to see if it was possible that the expensive item itself played a part in people's reactions. The definition of a status symbol changed based on a person's socioeconomic status, but the same effect of keeping off potential friends was seen regardless of social position.

    "At a social level, we may be wasting billions of dollars on expensive status symbols that finally keep others from wanting to associate with us, "says Kimberlee Weaver Livnat at the University of Haifa. She says, "And to the extent that close friendships are important to well-being, and we may be unintentionally hurting ourselves."

    However, Patricia Chen of the National University of Singapore said this does not necessarily mean status symbols are a bad thing. She says, "Our findings right now only apply to the formation of new friendships. Status symbols may be beneficial at other times and in other settings, such as when trying to establish new business contacts."

    In 1800, only three percent of the world's population lived in cities. Only one city — Beijing — had a population of over a million. Most people lived in rural areas, and never saw a city in their lives. In 1900, just a hundred years later, roughly 150 million people lived in cities, and the world's ten largest cities all had populations exceeding one million. By 2000, the number of city dwellers exceeded three billion; and in 2008, the world's population crossed a tipping point — more than half of the people on Earth lived in cities. By 2050, that could increase to over two-thirds. Clearly, humans have become an urban species.

    In the 19th and early 20th centuries, many people viewed cities negatively — crowded, dirty environments full of disease and crime. They feared that as cities got bigger, living conditions would worsen. In recent decades, however, attitudes have changed. Many experts now think urbanization (城市化) is good news, offering solutions to the problems of Earth's growing population.

    Harvard economist Edward Glaeser, author of The Victory of the Cir, is one such person. Glaeser argues that cities are very productive because "the absence of space between people" reduces the cost of transporting goods, people, and ideas. While the flow of goods has always been important to cities, what is most important today is the flow of ideas. Successful cities enable people to learn from each other easily, and attract and reward smart people with higher wages.

    Another urbanization supporter is environmentalist Stewart Brand. Brand believes cities help the environment because they allow haft of the world's population to live on about four percent of the land. This leaves more space for open country, such as farmland. City dwellers also have less impact per person on the environment than people in the countryside. Their roads, sewers, and power lines need fewer resources to build and operate. City apartments require less energy to heat, cool, and light. Most importantly, people in cities drive less so they produce fewer greenhouse gases per person.

    So it's a mistake to see urbanization as evil; it's a natural part of development  The challenge is how to manage the growth.

A British woman who once weighed some 322 pounds said breaking a roller coaster seat during an amusement park outing was her motivation for working toward a healthier weight.

Four years ago, Danielle Wright, 27, went to the Alton Towers theme park in Staffordshire, England, with her sister. She wanted to avoid roller coasters, fearing that she was too heavy for them. But she was convinced to give it a try and boarded one of the rides.

"Fitting in the seat was bad enough, but when it came to pulling down the safety bar, my stomach stopped it from working," she recalled. "One of the employees came over and had to put his foot against the ride and push the bar hard to make it click into place."

She was worried throughout the ride that “the bar was going to pop open and I was going to be thrown off the tracks". When the ride ended, the bar sprang up and made a huge noise. Shortly after, she heard an announcement over the loudspeaker saying the ride was temporarily closed due to a broken seat.

Though it was embarrassing, the incident presented a silver lining. "It's what I needed to motivate me to lose pounds," Danielle said. She totally changed her diet, cutting back on carbohydrate and replacing food like chocolate with healthier choices such as apples and yogurt. Meanwhile, she also began participating in workout classes.

In November 2016, Danielle found out she was pregnant. But as tempted as she was, she didn't allow herself to eat unhealthy food while pregnant and stuck to her new diet.

Now Danielle weighs some 140 pounds. "Being able to run and play with my little boy is, he best part of it all. I couldn't have asked for a better reward," she said.