Now, I've talked much about education. I've talked about teachers' responsibility for inspiring students and pushing you to learn. I've talked about your parents' responsibility for making sure you stay on track, and you get your homework done, and don't spend every waking hour in front of the TV .I've talked a lot about your government's responsibility for setting high standards.

    But at the end of the day, we can have the most dedicated teachers, the most supportive parents, the best schools in the world-and none of it will make a difference, none of it will matter unless all of you fulfill your responsibilities, unless you show up to those schools, unless you pay attention to those teachers, unless you listen to your parents and grandparents and other adults and put in the hard work it takes to succeed. That's what I want to focus on today: the responsibility each of you has for your education.

    I want to start with the responsibility you have to yourself. Every single one of you has something that you're good at. Every single one of you has something to offer. And you have a responsibility to yourself to discover what that is. That's the opportunity an education can provide.

    And no matter what you want to do with your life, I guarantee that you'll need an education to do it. You want to be a doctor, or a teacher, or a police officer? You want to be a nurse or an architect, a lawyer or a member of our military? You're going to need a good education for every single one of those careers. You cannot drop out of school and just drop into a good job. You've got to train for it and work for it and learn for it.

    That's okay. Some of the most successful people in the world are the ones who've had the most failures. J.K. Rowling's who wrote Harry Potter- her first Harry Potter book was rejected 12 times before it was finally published. Michael Jordan was cut from his high school basketball team. He lost hundreds of games and missed thousands of shots during his career. But he once said, “I have failed over and over and over again in my life. And that's why I succeed.”

And even when you're struggling, even when you're discouraged, and you feel like other people have given up on you, don't ever give up on yourself, because when you give up on yourself, you give up on your country.

    One morning, my newspaper wasn't delivered on time. Since I always brought it to work, it upset me that I would have to pick one up on my way to work. After breakfast, I was already running late, but figured I could make it if I hurried.

    As I pulled into the parking lot of the store, I noticed a young man in a wheelchair who seemed to be struggling. “Someone else will stop and help him,” I thought.

    However, no one stopped. I got out, and walked over to see what the trouble was.

    “Is there anything I can do?” I asked. It was then that I noticed he wasn't able to speak, and was still struggling with the chair.

    I looked down at the chair and noticed that the clamps (夹具) holding the electronic keyboard had apparently become loose causing the equipment to slip down, out of his reach.

    I pulled it back into place and then re-tightened the clamps. He hit a key on the keyboard. An electronic voice told me, “Thank you.” He then found the control that steered (操纵) the chair, turned and left.

    I got back in my car and headed off to work, completely forgetting my newspaper. As I drove, I felt a deep gratitude (感激). I was truly blessed to have the physical abilities that allow me to live a normal life. Here was this young man who relied on machines to get around and communicate. He probably dreamed about doing all the things that I thought were normal and simple.

    It's funny; fifteen minutes before that happened, I was whining because my morning paper hadn't arrived on time. I was glad I helped the young man, because he helped me gain a new viewpoint on everything I had in my life.

    English nowadays is widely used in science, business, the media and popular culture. Every time we turn on the news to see what's going on in East Asia, or Africa, or South America, or elsewhere, local people are being interviewed and telling us about it in English.

    Indeed, if one looks at the facts about the amazing reach of the English language, he or she would be surprised. English is used in over 90 countries as an official or semi-official language. English is the working language of many international colleges as well as of most international research scientists. It is believed that over one billion people worldwide are learning English now.

    One of the most remarkable sides of the spread of English around the world has been the extent (程度) to which Europeans are accepting it as their language. English is spreading from northern Europe to the south and is now firmly set up as a second language in countries such as Sweden, Norway, Netherlands and Denmark. If one visits any of them, it would seem that almost everyone there can communicate with ease in English.

    Recently, a special survey of Europeans' use of languages has just been published. The report said that English is the most widely known foreign language now, with 43% of Europeans saying they speak it and that Sweden now holds the most of English speakers, with over 89% of the population. What's more, English is the language rated as the most useful language to know, with over 77% of Europeans who do not speak English as their first language considering it useful.

English has without doubt become the global language.

    In recent years, a growing body of research has shown that our appetite and food intake are influenced by a large number of factors besides our biological need for energy, including our eating environment and our perception（感知）of the food in front of us.

    Studies have shown, for instance, that eating in front of the TV (or a similar distraction) can increase both hunger and the amount of food consumed. Even simple visual clues, like plate size and lighting, have been shown to affect portion size and consumption.

    A new study suggested that our short-term memory also may play a role in appetite. Several hours after a meal, people's hunger levels were predicted not by how much they'd eaten but rather by how much food they'd seen in front of them—in other words, how much they remembered eating.

    This disparity (新旧研究的差异）suggests the memory of our previous meal may have a bigger influence on our appetite than the actual size of the meal, says Jeffrey M. Brunstrom, a professor of experimental psychology at the University of Bristol.

    "Hunger isn't controlled individually by the physical characteristics of a recent meal. We have identified an independent role for memory for that meal," Brunstrom says. "This shows that the relationship between hunger and food intake is more complex than we thought."

    These findings echo earlier research that suggests our perception of food can sometimes trick our body's response to the food itself. In a 2011 study, for instance, people who drank the same 380-calorie milkshake on two separate occasions produced different levels of hunger-related hormones （荷尔蒙），depending on whether the shake's label said it contained 620 or 140 calories. Moreover, the participants reported feeling more full when they thought they'd consumed a higher-calorie shake.

    What does this mean for our eating habits? Although it hardly seems practical to trick ourselves into eating less, the new findings do highlight the benefits of focusing on our food and avoiding TV and multitasking while eating.

    The so-called mindful-eating strategies can fight distractions and help us control our appetite, Brunstrom says.

    When returning to south-western Germany, where my parents live, it is compulsory for me to go on a hike to connect with nature and reconnect with myself. So, that is exactly what I did the first sunny Sunday back in the beautiful Black Forest. The Huzenbacher See is a tarn in the middle of the northern Black Forest with abundant nature surrounding it. Approaching it after a good hour walk, I saw fascinating blue dragonflies in quantity that attracted us by the way they flew around. They didn't stand still for a photo, as they landed on leaves for a split second. We were also surprised at the yellow water lilies that can be seen floating on its surface between June and July.

    Sitting down at one of the benches surrounding the lake for a picnic was satisfying in two ways. I was aware of the world's beauty that gave me the energy to continue up the mountain to reach the most amazing view looking over the lake. The other was to really fill myself up in order to continue the adventure adequately, full up on some snacks and refreshing water from the well.

    The hike up wasn't as hard as expected and a good path was provided with dirty rocks and slippery stones all under the shade of the tall trees. This took about an hour and a half until reaching the beautiful view of the lake and land below. Once we had taken in the astonishing views, the walk back down took another hour or so, making the hike a 3-to4-hour round trip, which was well worth it!

    Simply being back in the Black Forest and having such pleasant hikes is definitely good for the soul and I highly recommend getting yourself outside, be it in the Black Forest or anywhere outdoors. Get your intake of vitamin D and, most importantly, take in the moments that nature has to offer.

    The extreme hot weather often makes people restless with sweats in summer. Even though people are annoyed by it, experts suggest that summer is the best season to give out your body's poisonous matters and refresh your energy.

    One popular choice is hot-stone massage(按摩). Therapists(理疗师)use smooth and heated stones, usually river rocks, to massage certain parts of the body, or set them on key points of the body. The warmth of the hot stones will promote blood circulation and also help muscles relax, while sweating is also believed to be good for letting out the body's poisonous factors.

    Another popular choice is hot-stone baths. The hot-stone bath will help the body give out poisons and humidity(湿气) that build up during the last winter. Summer is the best season to form a good body. Rather than use water or steam to heat and wash the body, people simply wear a coat or something comfortable, and then lie on heated stone tablets made of hot stones, which are warmed to around 45^oC. The body will gradually warm up and blood circulation will also be improved. More sweat will come out quickly. The sweat is smooth and fresh, not smelly like that released after sports activities. Such baths bring a number of health benefits, such as anti-aging, improved blood circulation and stress relief. The slimming effect of dieting can even be promoted.

    It dates back to ancient times to use hot stones for treatment, but the modern hot-stone massage generally owes to Mary Nelson, a native of Tucson, Arizona, America, whose trademark is "La Stone Therapy".

    The therapy is earning a good fame and popularity with many people, especially those who are often seated in cool rooms with air-conditioners. The hot-stone therapy can help cure many illnesses, back pain included.