Proudly reading my words, I glanced around the room, only to find my classmates bearing big smiles on their faces and tears in their eyes. Confused, I glanced toward my stone-faced teacher. Having no choice, I slowly raised the report I had slaved over, hoping to hide myself. “What could be causing everyone to act this way?”

    Quickly, I flashed back to the day Miss Lancelot gave me the task. This was the first real talk I received in my new school. It seemed simple: go on the Internet and find information about a man named George Washington. Since my idea of history came from an ancient teacher in my home country, I had never heard of that name before. As I searched the name of this fellow, it became evident that there were two people bearing the same name who looked completely different! One invented hundreds of uses for peanuts, while the other led some sort of army across America. I stared at the screen, wondering which one my teacher meant. I called my grandfather for a golden piece of advice; flip (掷) a coin. Heads—the commander, and tails—the peanuts guy. Ah! Tails, my report would be about the great man who invented peanut butter, George Washington Carver.

    Weeks later, standing before this unfriendly mass, I was totally lost. Oh well, I lowered the paper and sat down at my desk, burning to find out what I had done wrong. As a classmate began his report, it all became clear, “My report is on George Washington, the man who started the American Revolution.” The whole world became quite! How could I know that she meant that George Washington?

    Obviously, my grade was awful. Heartbroken but fearless, I decided to turn this around. I talked to Miss Lancelot, but she insisted: No re-dos; no new grade. I felt that the punishment was not justified, and I believed I deserved a second chance. Consequently, I threw myself heartily into my work for the rest of the school year. Ten months later, that chance unfolded as I found myself sitting in the headmaster's office with my grandfather, now having an entirely different conversation. I smiled and flashed back to the embarrassing moment at the beginning of the year as the headmaster informed me of my option to skip the sixth grade. Justice is sweet!

    Over the last week, a "poisonous kale（甘蓝菜）" theory has been going widespread after an article warned that the vegetable was associated with a variety of medical conditions. It's time to separate fear from fact on the health benefits of kale.

    As a member of the cabbage family, kale is low in calories and rich in nutrients and minerals, especially vitamin A,C and K. Consumed for thousands of years, it's been a health plus for millions of eaters throughout the world.

    However, numerous web articles have reported on some evidence offered by a medicine researcher. The researcher found that thallium（铊）was detected in a few people who were heavy consumers of kale. Thallium is a heavy metal often found in trace amounts（微量）in soil and minerals. His conclusion was that these medical conditions were connected to the impact that trace amounts of thallium detected in some kale samples had on the body.

    I don't think the conclusion is based on a strict scientific basis. It's essential to point out that the original report was in a web magazine, not a scientific journal which is subject to peer review by other scientists. A scientific review includes a careful evaluation of how the findings and conclusions were made. Certain factors are critical before an evidence-based conclusion can be made, such as: how many people were in a study; how well controlled were other factors; how much kale was consumed and for how long; how much thallium was in the kale.

    It is a fact that kale and other vegetables can absorb thallium from the soil. But the ability for a plant to absorb traces of a chemical does not automatically make it harmful to your health. And even finding measurable amounts of thallium in someone's body doesn't imply that the thallium is causing an ill health effect, according to the CDC.

    But we can still learn a lesson from this. Plants grow in soil. Growers must continue to be careful in monitoring the quality of their soil. And what about consumers? Eat your kale—and include lots of other colorful fruits and vegetables. As with all things in nature, variety is key for good health.

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    The first Europeans to occupy Canada's Prince Edward Island were the French in the 1500s. At that time, its name was Ile Saint-Jean. When the British took over in 1758, they changed the name to its current one in honor of Prince Edward, the first son of Britain's King George Ⅲ.

    Today many communities find their places in Prince Edward Island, but Charlottetown is the only one that can call itself a metropolitan(大都市)area, despite the fact that it is a small one. About 60,000 people live in the city and surrounding area. The city's center area remains relatively unchanged from its 19th century beginnings. Charlottetown's boardwalk runs alongside the water, past docks, boats, shops and restaurants. Historic homes line the streets. During summer months, costumed characters walk around the city and tell of it history.

    Cavendish beach welcomes beach lovers. The gulf streams makes the water warm and wonderful for swimming, and the island's 1,760-kilometer coastline means a beach is never far away.

    Nine of PEI's 63 lighthouses will welcome visitors in the summer. Besides enjoying stunning views from the tops, visitors can browse in the small museums and learn about the island's history.

The most popular time to visit PE I is July to August, when the average temperature reaches 23℃ during the day. From January to February, the average daytime high is only -3.3℃. Each winter, an average 318.2 centimeters of snow fall on the island, covering it with a white blanket.

    Considering the island's many visitors, it's no surprise that tourism is important there. Other key industries on the island are agriculture, fishing and information technology. With so much to offer, the island is naturally a desirable place to live as well.

    Japan is aging faster than any other nation. By the end of this decade, there will be three retirees for every child under 15 and before long, one in six people will be over 80. Its population will soon be falling by nearly a million people every year and some people predict that, some time in the next century, the last Japanese person will die. Other countries are encouraging immigration to deal with their demographic woes. But not Japan, which is using different ways to reduce pressure put on health care and social services.

    The Toto-made toilet, common in Japanese hotels, can push up to help the elderly. Now Toto is working with Daiwa House, Japan's largest house builder, to equip toilets for retirees. These have medical sensors that measure blood sugar levels, the blood pressure and body fat of the user. The data is emailed to the local GP through a built-in internet device (装置). So make sure you eat your greens and stay regular, or the doctor will be in touch.

    The over-75s account for more than a quarter of the deaths in car accidents on Japanese roads. Toyota is working with Professor Kawashima, who developed brain training games for Nintendo, to create intelligent cars that monitor brain activity in the elderly. Other technologies could also work to keep elderly drivers cautious.

    Japan has twice as many pets as it has children. But real animals are difficult to look after as their owners age. Paro is a furry white baby seal robot which responds to petting by moving its tail and opening and closing its eyes. It shows emotions such as surprise, happiness and anger, and has sold well in nursing homes where it is reported to stimulate (刺激) responses among those with dementia (痴呆).

    Japan's Institute of Physical and Chemical Research has developed Riba, a nursing care robot that can lift the elderly out of bed.

    There were no people on the park bench as I sat down to read beneath the branches of an old willow tree, with good reasons to sigh, for the world was dragging me down. At this time, a boy approached me. He stood right before me, and said with great excitement, “Look what I found!”

    In his hand was a flower, and what a pitiful sight, with its petals (花瓣) all worn. Wanting him to take his flower and go off to play, I managed a smile and then turned to the other side.

    But instead of leaving, he sat next to my side and placed the flower to his nose and said firmly and clearly, “It really smells pretty and it's beautiful, too. That's why I picked it. Here it's for you.”

    The flower before me was dying or dead. But I knew I must take it, or he might never leave. So I reached for the flower, and replied, “Just what I need.”

    But instead of placing the flower in my hand, he held it in mid-air. It was then that I noticed that the boy was blind.

    I heard my voice quiver (轻微颤抖), and at the same time my tears shone like the sun. As I thanked him for picking the very best one, he smiled and said, “You're welcome.”

    And then he ran off to play, not knowing the influence he'd had on me.

    I sat there and wondered how he managed to see a self-pitying woman beneath an old willow tree. Perhaps from his heart, he'd been blessed with true sight.

    Through the eyes of the blind boy, I could see the problem was not with the world; the problem was me. And for all of those times I had been blind. From now on, I promised to see beauty and appreciate every second. Then I held the flower up to my nose and breathed its fragrance and smiled as that young boy.

    Many people have long dreamed of being able to fly around as simply as riding a bicycle.

    Yet the safety and strength of a flying bike was always a big problem. Over the past 10 years' developments in technology have moved the dream of personal flying vehicle closer to reality. Now, two groups of inventors say such vehicles may be available very soon.

    Grant Stapleton from Malloy Aeronautics says the Hoverbike, which is able to get in and out of small spaces very quickly, will be a truly personal flying vehicle." It can be moved across continents very quickly because it can be folded and packed," he adds.

    Mr. Stapleton says safety was the company's main concern when developing the Hoverbike, He says the designers solved the safety issue by using overlapping rotors (折叠旋翼)to power the vehicle. The company is testing both a one-third size model and a full-size prototype (原型))of the Hoverbike.

    Inventors say their Hovebike will most likely be used first by the police and emergency rescue teams.

    In New Zealand, the Martin Aircraft Company is also testing a full-size prototype of its personal flying bike, called Jetpack. It can fly for more than 30 minutes, up to 1,000 meters high and reach a speed of 74 kilometers per hour.

    Peter Coker is the CEO of Martin Aircraft Company. He said Jetpack" is built around safety from the start" In his words, reliability is the most important part of it. We have safety built into the actual structure itself very similar to a Formula One racing car."

    Jetpack uses a gasoline-powered engine that produces two powerful jet streams. Mr. Coker says it also has a parachute (降落伞)that can be used should there be an emergency.

    "It opens at a very low altitude and actually saves both the aircraft and the pilot in an emergency," he adds.