One of the most debated issues about alcohol consumption has been the consistent finding that those who don't drink tend to die sooner than those who do.The standard Alcoholics Anonymous explanation for this finding is this：many of those who give up alcohol are actually former hard­core drunks who had already brought health problems associated with drinking.

    But a new paper suggests that abstaining(戒除)from alcohol does tend to increase one's risk of dying，even when you leave former problem drinkers out.The most shocking part—abstainers'(禁酒者)mortality rates(死亡率)are higher than those of heavy drinkers.

    Moderate(适度的)drinking，which is defined as one to three drinks per day，is associated with the lowest mortality rates.Moderate alcohol use is thought to improve heart health，circulation and sociability，which can be important because people who are cut off don't have as many family members and friends who can notice and help treat health problems.

    But why would abstaining from alcohol lead to a shorter life？It's true that those who abstain from alcohol tend to be from lower socioeconomic classes，since drinking can be expensive.And people of lower socioeconomic status have more life stressors(压力因素)．

    Though heavy drinking is associated with higher risk for many diseases，heavy drinkers are less likely to die than don't drink. One important reason is that alcohol strengthens social interactions，and social interactions are vital for maintaining mental and physical health.Nondrinkers show greater signs of depression.

    The authors of the new paper are careful to note that even if drinking is associated with a longer life，it can be dangerous：it can affect your memory severely and it can lead to falls and other troubles that can affect your life.There's also the dependency issue：if you become addicted to alcohol，you may spend a long time trying to get off the bottle.

    I came to study in the United States a year ago .Yet I did not know the real American society until I was injured in a car accident because after the accident I had to see a doctor and go to court.

    After the accident, my roommate called a doctor for me. I was very grateful and determined to repay him one day. But the next day, he asked me to pay him $200 for what he had done. I was astonished. He had good reason to charge me, he said. And if I wanted to collect money from the person who was responsible for my injury, I'd have to have a good lawyer. And only a good doctor can help me get a good lawyer .Now that he had helped me find a good doctor, it was only fair that I should pay him.

    But every day I went to see the doctor, I had to wait about 50 minutes. He would see two or three patients at the same time, and often stop treating one so as to see another. Yet he charged me $115 each time .The final examination report consisted of ten lines, and it cost me $215.

    My lawyer was all smiles the first time we met. But after that he avoided seeing me at all. He knew very well the other party was responsible for the accident, yet he hardly did anything. He simply waited to collect his money. He was so irresponsible that I decided to dismiss him. And he made me pay him $770.

    Now I had to act as my own lawyer. Due to my inexperience, I told the insurance company the date I was leaving America. Knowing that, they played for time...and I left without getting a cent.

    Some materials are obtained from natural resources that are changed by chemical processes in a laboratory. The resulting artificial materials are synthetic, or human-made.

    Plastic is a synthetic substance, obtained from petroleum, a fossil fuel. The molecules（分子）in petroleum are split and then linked into chains. Plastic is an example of a polymer, a material made of repeating patterns of atoms linked together. Most polymers are synthetic. They are made by polymerization, the process of chemically linking many smaller molecules to form a larger molecule that has different physical features. Some polymers, such as proteins, occur naturally.

    Plastic is a key component of many products. When heated into an almost-liquid form, plastic can be made into fibers, sheets, or molds（模具）. It can be mixed with other elements to remain flexible, or it can harden into a solid. Plastic fibers can be made into clothing or carpeting. Sheets of plastic can be made into plates. Molded plastic can be sued for protective helmets or car bumpers.

    Most plastics can be reheated and remolded repeatedly. This feature makes plastic very easy to use. Polymers can be pulled into fine strings or molded into almost any kind of shape. For example, tubes of plastic can be shaped into bottles by different processes. One such process is extrusion blow-molding. Most plastics are also resistant to many chemicals that might harm other materials. This quality is the reason that so many cleaning liquids are packaged in plastic bottles.

    Plastics are good insulators that can stop electricity or heat to pass through. Look around your kitchen, and observe where plastics are used. Pot handles are sometimes made of plastic, as are cooking tools, toaster controls, and microwave cookware. Food-storage wraps and containers may be made of plastic. Take a walk outdoors, and note all the plastic items you see. Gardening tools, such as watering cans and sprayers, are often made of plastic. Swings and slides made of plastic do not become as hot as metal, so they are safer for play. Because plastics can be heated, remolded, and made into something else, they can be recycled and reused.

    One advantage of the Internet is shopping conveniently online for clothes; one disadvantage of the Internet is also shopping conveniently online for clothes.

    “Nothing fits,” said Lam Yuk Wong, a senior in electrical and computer engineering at Rice University. “Everyone says this. They order clothes and they don't fit. People get very unhappy.”

    Wong and her design partner, Xuaner “Cecilia” Zhang, are Team White Mirror, creators of what they call a “virtual (虚拟) fitting room”. Their goal is simple and consumer-friendly: to let online clothing shoppers have a perfect fit and a perfect look when shopping every time.

    Both women are from China, Wong from Hong Kong and Zhang from Beijing. They both order most of their clothing online. They got the idea from their own experience as consumers and from listening to the complaints of friends and relatives. “They say, 'The color is wrong' or 'I got the right size but it still does not fit.' We want to make it like you're in the store trying on the clothes,” Zhang said.

    Using a Kinect developed by Microsoft for use with its Xbox 360 video game player.

    Zhang scans Wong and turns  her image into, in effect, a virtual model, keeping Wong's dimensions (尺寸), and even her skin and hair color. “We put the clothes on the shopper's 3-D body models and show how they look when they are dressed,” Wong said. So far, Wong and Zhang have adapted the software to show dresses and shirts, and they are now working on shorts.

    Asked if she thought men as well as women might be interested in using their virtual fitting room, Wong said, “I think their wives will care about this, so it will also be important to men.”

    "Depend on yourself" is what nature says to everyone. Parents can help you. Teachers can help you. Others can help you. But all these only help you to help yourself.

    There have been many great men in history. But many of them were poor in childhood, and had no uncles, aunts or friends to help them. Schools were few and not very good. They could not depend on them for education. They saw how it was, and set to work with all their strength to know something. They worked their own way till they became well­known.

    One of the most famous teachers in England used to tell his pupils, "I can not make worthy men of you, but I can help you make men of yourselves."

    Some young men do not try their best to make themselves valuable to the human beings. They can never gain achievements unless they see their weak­points and change their courses. They are nothing now, and will be nothing as long as they live, unless they accept the advice of their parents and teachers, and depend on their own honest efforts.

71-year-old, Helen Lloyd Jones from Cardiff recently completed her first marathon and is encouraging others of her age to take up the challenge. "Do it. We only live once," she said after the event.

Helen took up running in her 50's while working as a teacher. After jogging alongside one of her students during a sports day race, Helen said, "I felt terrible, absolutely terrible. It was a wakeup call and I started to practise jogging."

Helen started attending her local parkrun, but decided she needed a bigger challenge to keep her motivated. Once the idea of running 26.2 came into her head, she was decided, and set her sights on running a larger race, using the support of the crowds to get her round.

Helen didn't tell her husband for the first five months of her training as she knew he'd be worried about the toll the distance might have on her, saying g afterwards, "The difference between the man who waved me goodbye and the smiling man who greeted me when I returned was a reflection of how much he had been worrying. But he is very proud of me."

At 71, Helen explains how she didn't do her training "by the book". After trying to do a long run, a speed run and a hill run each week, she soon found her body was not able to recover fast enough between sessions. Instead, she chose one long run a week with her local running club Pegasus and friend Sally, so she could feel confident with the distance. 

A proud grandmother, Helen is I now taking her grandchildren to parkruns and junior parkruns. She hopes that they will remember running with their grandmother when they grow up. Are there more marathons in her future? "I said I would only do the one, but have a feeling that if I got a place in London or New York... I might change my mind."