The following is a father's advice to his son or daughter, who has just graduated from high school：

    First of all, congratulations on your graduation!Graduation from high school means that a new stage of life is ahead of you．At the beginning of this new stage, I have some advice for you．

    Clean your own room and do your own laundry(洗衣物的活). After you have messed up(弄乱)something, you should learn to clean it up yourself．Cleanliness is indeed close to godliness(信奉上帝)．

    Don't mistake knowledge for wisdom. No matter how much information or knowledge you have gained, you'll never make sound(正确的)judgments if you don't have wisdom. Wisdom comes from imagination and reflection(反省)．If you can imagine the possible future outcomes of your present decisions and actions, you can avoid mistakes．And if you can reflect on the mistakes you have made, you can avoid making the same mistakes again and again．Such is wisdom．

    Don't complain．When you take up a job, do your best to carry it out．Don't waste time complaining about it, no matter how difficult and boring it is．

    Finally, be an early bird．If you get up earlier than the sun, you can watch it rising up slowly into the sky．And the sight of the rising sun will warm your heart and give you energy for the day ahead．Besides, being an early bird, you have plenty of time to take exercise or do a lot of work．

    When we're in need, we always turn to our parents for help. But would you like them to hear the conversations you have with your friends on the school playground or lunch queue? Social networking sites have become extensions (延伸) of the school hallways, so would you add your parents as “friends” and allow them to view your online activities and conversations with friends?

    In the past the generation gap included a technology gap, where children were up to date with latest technology and parents were left behind, content to continue their day to day lives as they always had because they had no need to know more about technology. However, more and more parents are beginning to realize just how important social networks are in their lives. This realization has given many parents the motivation to educate themselves about social networking sites.

    These days many people are attracted to social networking sites because they can choose who they have around them; there's also a certain amount of control over privacy that we don't get in real life. Sometimes we feel that privacy is violated (侵犯）when we must accept a “friend” request from a parent or family member.

    It's a difficult choice whether or not to allow a parent to become a part of our online lives. On the one hand we don't want to “reject” their request because that might hurt their feelings or make them feel you have something to hide. On the other hand if you do accept, then you could have a sense of being watched and no longer feel free to comment or communicate the way you did before.

    A recent survey suggested that parents shouldn't take it personally if their child ignores their request: “When a teen ignores a parent's friend request, it doesn't necessarily mean that they are hiding something, but it could mean that this is one part of their life where they want to be independent.”

    Perhaps talking with parents and giving explanations would help soften the blow if you do choose not to add them to your friends list.

    Denali National Park, Alaska

    History

    Within Denali National Park, the Toklat River will always have a special significance, as it was the location where naturalist Charles Sheldon built a cabin and was so moved that he fought to preserve the land. He moved back east and spent nine years lobbying (游说）to create Alaska's first national park.

    When to Visit

    To avoid the crowds, visit in June, but keep in mind that there are up to 21 hours of sunlight in Alaska in summer. If it seems like a bit much for your taste, try visiting in late August or September.

    If you visit to climb Mount McKinley, May and early June are the best times to climb.

    Major Attractions

    It is difficult not to see Denali's largest attraction towering 20,320 feet high. Mount McKinley can even be seen up to 70 miles away on a clear day. If you brave the climb to the top, you will be rewarded with charming views of the Alaska Range.

    Sable Pass is a prime spot to view grizzly bears. Closed to off-road foot traffic, the area is popular for bears feeding on berries, roots, and even occasionally on other mammals.

    Beginning at just below the summit of Mount McKinley, Muldrow Glacier flows 35 miles through a gorge and across the tundra. Twice in the last hundred years, the Muldrow has surged (涌动）, most recently in the winter of 1956-1957.

Accommodation

    Five campgrounds are located within the park, and many are open from late spring to early fall.Note: reservations are strongly recommended during summer. Riley Creek campground is open all year round, and all but two (Sanctuary and Wonder Lake) offer RV (可供居住的大篷车）sites.

    Also within the park are a few lodges (旅馆）—North Face Lodge, Denali Backcountry Lodge and Kentishna Roadhouse.

    If you are travelling in Britain, besides so many world-class things to see and do in London, planning a day trip away from it can also be good.

Stonehenge

    Stonehenge consists of a group of large standing stones. The 5,000-year-old stones are one of the world's biggest mysteries(谜) that no one has understood yet. While travelling Stonehenge, you can imagine wildly and decide for yourself how the stones came to be there and why. Although you can't touch the stones, you can walk among them and feel the changes of seasons.

Windsor

    Most people visit Windsor to see Windsor Castle, where the Queen spends most of her time. The castle(城堡) itself could keep you busy for days. The best way to appreciate Windsor Castle is to approach via the Long Walk, a straight road where there are no cars, but you might see some deer.

Oxford

    Oxford is best known for its world-famous university. The large student population keeps the university young and fresh, though there's no shortage of history if you want it. 30 colleges make up the university itself. A tour of the colleges is a must—Harry Potter fans will find many places used in the movies.

Bath

    Founded by the Romans, who used the area's springs to create a spa retreat（水疗中心）, Bath's now the best tourist attraction of Southwest England. Visitors never miss the Roman Bath Complex, which is divided into four main parts—the Bath House, the Sacred Spring, the Roman Temple and the museum, which displays fascinating finds from the historical ruins of the city.

    Halloween is a holiday full of tricks and treats and all things frightening and fun. But what happens when you trade your sweets for a scare? The result is always healthier than candy.

    Being frightened can be good for you. Think about your favorite scary books or movies. You are scared but you just can't resist reading or watching them. Being frightened makes your brain flood with healthy chemical substances that excite your mood and release feelings of great excitement.

    When you're frightened, your body also produces a chemical called oxytocin, which helps people bond with one another. So, if you're at a haunted(闹鬼的) house with some pals, that experience can help strengthen your friendship. “Watch people walking out of a haunted house, and you'll see lots of smiles and high fives,” says Dr. Margee Kerr, a sociologist who studies fear.

    There is also some evidence that being scared can help a person manage stressful situations. Things like giving a presentation in front of your class or performing in a school play can make us fearful and anxious. But these experiences help build a sort of endurance to fear that makes us more confident. “You become more comfortable with the physical experience of fear, and so you're better able to work through it during tense situations,” Kerr explains.

    Though some haunting may be healthy, it's important to remember that people experience fear in different ways. What may be fun for one person could be too scary for another. And Kerr notes that kids younger than six and or seven can't separate real and make-believe, so seeing something frightening could have lasting, negative effects.

By the end of the century, if not sooner, the world's oceans will be bluer and greener thanks to a warming climate, according to a new study. 

At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean's appearance. 

Phytoplankton live at the ocean surface, where they pull carbon dioxide into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean's warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients. 

Stephanie Dutkiewicz, a scientist in MIT's Centre for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. "Not only are the quantities of phytoplankton in the ocean changing, " she said, "but the type of phytoplankton is changing. "