An artist in Oakland, California is using his skills to help the homeless. Greg Kloehn builds very small shelters that make life on the streets a little more comfortable. The structures offer the homeless some safety and protection from bad weather. Each little house also has wheels on the bottom so it can go wherever its owner goes.

    Greg Kloehn has given away at least 20 tiny houses. Several are on the roadside near an active railroad. On a recent day, Mr. Kloehn stops at one to visit Oscar Young. The two men hug. Inside his little shelter Mr. Young gets relief from cold nights on the streets. Mr. Kloehn also visits Sweet-Pea, another friend who also lives in one of the little homes the artist built. She says it keeps her safe and protects her belongings.

    In the mornings, Mr. Kloehn searches the streets for building materials. He gathers what he can and takes it to his studio. There, he puts the houses together. Empty coffee bags become roof material. A washing machine door and refrigerator part become windows. Nails, screws and the sticky glue hold all the pieces together. The artist also attaches a small electrical device to the house. The device is powered by the sun.

    Some of the people living on the streets once had normal houses of their own. But some of the people say they have learned to live with less and they are thankful to that man.

    Mr. Kloehn says his work is not a social project. He says he is just someone using his skills to help his homeless neighbors.

    Let's look back all these years you've gone through, what have you done for your life? Are you spending your time wisely to make your life worthwhile? Neal Wu shared some ways we should do to make our short time of life meaningful, find out what you need to do next:

    a. Make friends as opposed to networking

    Your friends will go a lot further than the professional contacts you make, especially since only one of the two groups is invested in your personal happiness.

    b. Become an expert by learning as much as you can and deeply seeking out the things you are curious about

    Find the things you enjoy and practice the skills you want to develop. If you can achieve expertise then it will be easy to obtain an audience.

    c. Volunteer to help out those less fortunate

    In the process you will gain a ton of new perspective and will better understand other people's real problems. In a society that always looks upward, these people are being forgotten easily.

    d. Become as independent as possible

    Even though you work in a big company, you should constantly make small steps to reduce your dependence on your job. Write a book, build an app, or start a small business on the side. Release your inner entrepreneur.

    e. Don't spend too much time worrying about your personal brand

    Accomplish(完成) things, and the recognition will follow.

    f. Stop treating life as a competition and do things for their own sake

    Genuine(真正的) interest should be what drives you to improve yourself, rather than a desire to beat others. Find a community of people who are interested in the same things as you do, and drive each other to keep improving.

    Many people turn to doctors or self-help books, but they ignore a powerful thing that could help them fight illness: their friends.

    Researchers are only now starting to pay attention to the importance of friendship in health. A 10-year Australian study found that old people with a large circle of friends were 22 percent less likely to die during the study period than those with fewer friends. A large 2007 study showed an increase of nearly 60 percent in the risk  for obesity (肥胖) among people whose friends gained weight. And last year, Harvard researchers reported that strong social ties could improve brain health as we age.

    “In general, the role of friendship in our lives isn't well realized,” said Rebecca, a professor at the University of North Carolina. “Friendship has a bigger effect on our psychological health than family relationships.”

    While many friendship studies are about the close relationships of women, some research shows that men can benefit, too. In a six-year study of 736 middle-aged men, having friendships reduces the risk of heart attack. Only smoking was as important a risk factor (因素) as having little social support.

    Exactly why friendship has such a big effect isn't entirely clear. While friends can send a sick person to the hospital or pick up medicine, the benefits go well beyond physical assistance. Friendship clearly has a big psychological effect. “People with stronger friendships feel like there is someone they can turn to,” said Karen, a doctor. "The message of these studies is that friends make your life better.”

    In the latter part of the 20th century, child labor remains a serious problem in many parts of the world. Studies carried out in 1979, the International Year of the Children, showed that more than 50 million children below the age of 15 were working in various jobs often under dangerous conditions. Many of these children live in underdeveloped countries in Latin America, Africa, and Asia. Their living conditions are crude and their chances for education small. The poor income they bring in, however, is necessary for the survival of their families. Frequently, these families lack the basic necessities of life—adequate food, decent（得体的、合适的）clothing and shelter, and even water for bathing.

    In some countries industrialization has created working conditions for children that are comparable to the worst features of the 19th-century factories and mines. In India, for example, some 20,000 children work 16-hour days in match factories.

    Child-labor problems are not, of course, limited to developing nations. They occur wherever poverty exists in Europe and the United States. The most important efforts to eliminate（根除）child-labor abuses throughout the world come from the International Labor Organization (ILO), founded in 1919 and now a special agency of the United Nations. The organization has introduced several child-labor conventions（规定）among its members, including a minimum（最低）age of 16 years for admission to all work, a higher minimum age of specific types of employment, compulsory（强制的）medical examinations, and It depends on voluntary obedience（服从）of member nations.

C

    The idea of spending a year away from home is something that attracts nearly everyone. So why is taking a gap year still considered the wild card（百搭牌）?

    Choosing to take a year out can help you gain valuable experience as well as give you the opportunity to save up some funds to help you with accommodations when you go to university.

    For a teenage student, the prospect of providing for yourself, miles away from home, can be discouraging. But with an increasing number of gap year companies providing travel and trips abroad to suit any need, it is becoming easier to tailor a dream trip.

    You can also find gap year companies that cover everything from internships（实习）abroad to paid work and volunteering. Such companies offer ideas and inspiration to kick-start your travelling dream.

    But gap years don't have to be all about travel. You can have a beneficial year out of education and stay right where you are. Stephanie Wood wants to be a mental health nurse, but with related health courses being some of the most exclusive and competitive around, she is taking a year off from education in order to gain an edge through work experience: “My plan is to get a job that directly relates to my course for the next few months. Working there over a stretch of time will both give me an impression and insight into the working world of nursing—knowledge to help me through university when I choose to go.”

    Gap years aren't for everyone. Readjusting to an academic timetable after spending time abroad can be a shock. You also need to consider the practicalities, from financing your gap year to surviving without home comforts.

    Next time you make yourself a hot cup of tea or coffee, you might want to let it cool down a bit before drinking.

    Researchers say letting your hot drinks cool off could help you avoid some kinds of cancer. Researchers at the International Agency for Research on Cancer (IARC) found evidence that drinks at temperatures above 65℃, when swallowed, can cause cancer of the esophagus (食道). The researchers examined findings from other studies where tea and coffee were often served at 70℃ or above. Those studies were completed in Iran, China and South America.

    In developed countries, health experts have linked esophageal cancer to smoking and alcoholic（酒精）drinks. However, this form of cancer is more common in areas where people drink beverages（饮料；酒水）at very high temperatures.

    In Europe and the United States, many people drink coffee and tea at temperatures around 60℃.And they often add milk which lowers the temperature greatly. However, tea-drinkers in Iran and mate-drinkers in South America often enjoy their beverages at closer to 70℃.

    The researchers find that South Americans not only drink their mate very hot, they also drink it through a metal straw(吸管). This sends the scalding liquid directly into the throat.

    The findings, however, are good news for coffee drinkers. In 1991, the World Health Organization listed coffee as possibly carcinogenic (致癌的).” The WHO officials have since changed their position on that listing. They now suggest that the temperature of your hot drink is a greater risk factor than the actual drink itself.

    The results suggest that drinking very hot beverages is one probable cause of esophageal cancer and that it is the temperature, rather than the drinks themselves, that appears to be responsible.