Bad news sells. If it bleeds, it leads. No news is good news, and good news is no news. Those are the classic rules for the evening broadcasts and the morning papers. But now that information is being spread and monitored(监控) in different ways, researchers are discovering new rules. By tracking people's e-mails and online posts, scientists have found that good news can spread faster and farther than disasters and sob stories.

    “The 'if it bleeds' rule works for mass media,” says Jonah Berger, a scholar at the University of Pennsylvania. “They want your eyeballs and don't care how you're feeling. But when you share a story with your friends, you care a lot more how they react. You don't want them to think of you as a Debbie Downer.”

    Researchers analyzing word-of-mouth communication—e-mails, Web posts and reviews, face-to-face conversations—found that it tended to be more positive than negative(消极的), but that didn't necessarily mean people preferred positive news. Was positive news shared more often simply because people experienced more good things than bad things? To test for that possibility, Dr. Berger looked at how people spread a particular set of news stories: thousands of articles on The New York Times' website. He and a colleague analyzed the “most e-mailed” list for six months. One of his first findings was that articles in the science section were much more likely to make the list than non-science articles. He found that science amazed Times' readers and made them want to share this positive feeling with others.

    Readers also tended to share articles that were exciting or funny, or that inspired negative feelings like anger or anxiety, but not articles that left them merely sad. They needed to be aroused(激发) one way or the other, and they preferred good news to bad. The more positive an article, the more likely it was to be shared, as Dr. Berger explains in his new book, “Contagious: Why Things Catch On.”

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    Alzheimer's disease is a major national health problem. Nearly 2 million Americans over the age of 65 have Alzheimer's disease. It is a leading cause of death among the elderly. But Alzheimer's disease is not confined (限于) to the aged. There may be a million or more people under the age of 65 suffering from the disease.

    At one time, people suffering from the disease were said to be "getting old". The disease was thought to be a natural part of growing old, but it is now known that Alzheimer's disease strikes young and old alike. It is an organic (器官的) disease, that destroys brain cells.

    Alzheimer's disease affects the patient's memory, speech, and movement. In the beginning stages of the disease, the patient may seem slightly confused. He may have trouble speaking, and then the patient's memory begins to fail. He may forget dates, numbers, names and plans.

    As the disease progresses, the patient may not recognize family and friends. These symptoms(症状) often cause terrible anxiety in the patient. He may feel lost and frightened. Sometimes the patient reacts with wild and bad behavior.

In the last stages of the disease, the patient may not be able to take care of himself. He may have lost the ability to speak and walk.

    Scientists don't know exactly what causes Alzheimer's disease. It may be caused by a virus (病毒). It may be caused by a poisonous substance(物质) in the environment. At present, there is no cure for the disease. But there are ways to slow its progress. Exercise and physical treatment can help the patients of this disease.

    A new study by the British government has discovered the mental well-being of the country's teenage girls has worsened.

    The survey, which included 30,000 14-year-old students, showed 37 percent of the girls with psychological stress, rising from 34 percent in 2010. British boys' stress level was actually seen to fall over the same period, from 17 percent to 15 percent. The report's authors pointed out the "arrival of the social media age" could be a major contributing factor for increasing stress among teenage British girls.

    "The adolescent years are a time of rapid physical, cognitive and emotional development," Pam Ramsden, a lecturer in psychology at the University of Bradford in the United Kingdom, wrote in a recent blog post. "Teenagers interact with people in order to learn how to become competent adults. In the past, they would engage with parents, teachers and other adults in their community as well as extended family members and friends. Now we can also add social media to that list of social and emotional development." Throughout adolescence, girls and boys develop characteristics like confidence and self-control. Since teenage brains have not completely developed, teens don't have the cognitive awareness to keep from posting inappropriate content. Furthermore, this content can easily be circulated far and wide with disastrous implications.

    "Social media can also feed into girls' insecurities about their appearance," Ramsden said. These sites are often filled with images of people with body type unattainable to the normal person. However, these images and the messages tied to them creep into social standards.

    "Social media allows girls to make comparisons among friends as well as celebrities and then provides them with 'solutions' such as extreme dieting tips and workouts to reach their goals," Ramsden said. "Concerns about body image can negatively impact their quality of life preventing them from having healthy relationships and taking up time that could be better spent developing other aspects of their personalities."

    As a college student, I have planned my future career goals. I would like to work as a sales assistant in a computer company, then a sales manager and finally boss of my own company.

    At the very beginning, I plan to find a job in a famous company producing computers, in which all the staff are fully happy at work and I can experience job satisfaction most of the time. Only such kind of company can provide me with good working atmosphere and eagerness to learn more so as to get well prepared for my future profession.

    At first I want to be a sales assistant and always keep myself busy working in and out of the company, such as, answering telephones, doing repair work, even cleaning the rooms. Although the salary may be low, I will seize every chance to learn from other staff. In my spare time, I will take some courses so as to get more qualifications and experience in this field. In three or five years, I am determined to become a sales manager who is responsible for the selling of the computers. I will interview as many customers as possible and do market research and improve our products. Meanwhile I will take care of my staff to make them eager to work to the best of their abilities.

    As is known to us, it is hard to manage a company, but I will make every effort to achieve my goal step by step, and I am sure "There is nothing difficult in the world if you put your heart into it."

    I was shopping in the supermarket when I heard a young voice.

    "Mom, come here！There's this lady here my size！"

    The mother rushed to her son；then she turned to me to apologize. I smiled and told her, "It's okay."

    Then I talked to the boy, "Hi, I'm Darryl Kramer. How are you?"

    He studied me from head to toe，and asked, "Are you a little mommy？"

    "Yes, I have a son," I answered.

    "Why are you so little？" he asked. "It's the way I was born," I said. "Some people are little. Some are tall. I'm just not going to grow any bigger." After I answered his other questions, I shook the boy's hand and left.

    My life as a little person is filled with stories like that. I enjoy talking to children and explaining why I look different from their parents.

    It takes only one glance to see my uniqueness. I stand three feet nine inches tall. I was born an achondroplasia dwarf(侏儒). Despite this, I did all the things other kids did when I was growing up.

    I didn't realize how short I was until I started school. Some kids joked on me, calling me dwarsf. Then I knew. I began to hate the first day of school each year. New students would always stare at me as I struggled to climb the school bus stairs.

    But I learned to smile and accept the fact that I was going to be noticed my whole life. I decided to make my uniqueness an advantage rather than a disadvantage. What I lacked in height, I made up for in personality.

    I'm 47 now, and the stares have not diminished as I've grown older. People are amazed when they see me driving. I try to keep a good attitude. When people are rude, I remind myself, "Look what else I have－a great family, nice friends. "

    It's the children's questions that make my life special. I enjoy answering their questions. My hope is that I will encourage them to accept their peers(a person of the same age, class, position, etc.), whatever size and shape they come in, and treat them with respect.