Diet Coke, diet Pepsi, diet pills, no-fat diet, vegetable diet… We are surrounded by the word “diet” everywhere we look and listen. We have so easily been attracted by the promise and potential of diet products that we have stopped thinking about what diet products are doing to us. We are paying for products that harm us psychologically and physically.

    Diet products significantly weaken us psychologically. On one level, we are not allowing our brain to admit that our weight problems lie not in actually losing the weight, but in controlling the consumption（摄入） of fatty, high-calorie, unhealthy foods. Diet products allow us to jump over the thinking stage and go straight for the scale（秤）instead. All we have to do is to swallow or recognize the word “diet” in food labels(标签).

    On another level, diet products have greater psychological effects. Every time we have a zero-calorie drink, we are telling ourselves without knowing that we don't have to work to get results. Diet products make people believe that gain comes without pain, and that life can be without resistance（抵制and struggle.

    The danger of diet products lies not only in the psychological effects they have on us, but also in the physical harm that they cause. Diet foods can indirectly harm our bodies because consuming them instead of healthy foods means we are preventing our bodies from having basic nutrients(营养成分). Diet foods and diet pills contain zero calorie only because the diet industry has created chemicals to produce these wonder products. Diet products may not be nutritional, and the chemical that go into diet products are potentially dangerous.

    Now that we know the effects that diet products have on us, it is time to seriously think about buying them. Losing weight lies in the power of minds, not in the power of chemicals. Once we realize this, we will be much better able to resist diet products, and therefore prevent the psychological harm that comes from using them.

    The winter vacation is just around the corner. With such a long holiday to spend, have you decided where to get yourself relaxed from the great pressure of school study? Our company specializes in civil tours. We take pride in offering you the best services and in providing you with a vacation that will be fondly remembered. The following places can be your unforgettable destinations in our country.

    A. The Australian Museum

    The Australian Museum has an international reputation in the fields of natural history and indigenous studies research and exhibitions. The museum was established in 1827 and is Australia's first museum of natural science and cultural artifacts.

    B. Sydney Olympic Park

    Home of the Best Games Ever and 2003 Rugby World, Sydney Olympic Park is a gold medal attraction and continues to serve as a major sport and social venue.

    Apart from its ultra-modern sport venues, Sydney Olympic Park is set in extensive parklands. Bicentennial Park, one of Sydney's most popular recreational areas, is criss-crossed with walking and bicycle tracks.

    C. Art Gallery of New South Wales

    Located within a short walking distance from Sydney's CBD, the Art Gallery of New South Wales is one of Australia's foremost art museums housing some of the finest works of art in the country.

    The Gallery has a rich and diverse collection including key works of the Heidelberg School and favorite modern Australian artists including Brett Whiteley and Margaret Preston, as well as permanent Australian, European, Asian, contemporary and photographic galleries.

    D. Koalas Park Sanctuary

    Koalas are on show every day. Shows are at 10:20 A.M., 11:20 A.M., 2:00 P.M., 3:00 P.M. where you can cuddle, feed, pat and have your photo taken with the Koalas. See free roaming Koalas as well, 10 acres of rainforest. Walk in and pat our kangaroos.

    While serious training is important for all dogs, playtime is just as important. {#blank#}1{#/blank#} Use these games to help teach your dog how to play.

1). Hide and Seek

    Hide and seek isn't just for kids. Dogs can really enjoy this game. Pick up one of your dog's favorite toys or treats. Tell your dog to stay. {#blank#}2{#/blank#} When you are ready, call your dog to come to you. If possible, squeak (使吱吱叫) the toy or shake the treats. Reward your dog with praise and the toy or treat when she finds you.

2). Fetch

    Many dogs have a natural ability to fetch. Other dogs can be taught how. {#blank#}3{#/blank#} Play indoors with a soft toy or outdoors in a fenced-in area with a ball or disc. For dogs that really love to run, try this game of fetch!

3). Find the Treat

    Dogs have superior senses of smell, and most love to use their noses to find food. Let your dog use her brain and her nose to find hidden goodies. First, have your dog stay out of sight. Then, hide her favorite treats in various places around the room. {#blank#}4{#/blank#} If help is needed, you can lead her around or point to areas for her to explore.

Whatever the game, safety comes first! Remember to watch your dog for signs of exhaustion or overheating when you are playing. Stop if your dog seems tired or shows signs of anxiety. {#blank#}5{#/blank#} When other dogs or people are around, it may create a dangerous distraction.

    I was in my first year of college, making friends and enjoying life, but then my whole world turned upside down. I had a heart attack. It felt like someone was stabbing (刺) me in the chest with a knife over and over again.

    After three months of rest I went back to college, but then things took a turn for the worse. I was staying at my Nana's house and woke up in the middle of the night with a terrible pain in my chest. I knew I was having a heart attack again.

    I couldn't even shout for help. Luckily my grandpa was going to the toilet and heard me falling out of bed. If it wasn't for him, I probably wouldn't be here.

    The two holes in my heart were causing the problems and I needed an operation immediately to repair them. Unfortunately, the surgery didn't go well and they only managed to repair one of the holes.

    When I woke up from the operation, I had a really dry mouth and couldn't wait to have something to eat and drink. The biggest shock of all came when I was told that I needed a heart transplant and was put on the register. The doctors were stunned at how quickly heart failure came on – it usually takes years, but it took my heart less than six months to get to that stage. My whole world came crashing down, but I stayed strong. It was a choice between crying every day and getting on with my life.

    As time went on, life became even harder. I hated feeling weak all the time and needing help with everything. It got to the point where I thought I would never get a new heart. I was diagnosed with depression.

    Even though I thought that Christmas 2008 would be my last, I really enjoyed it and even had a good New Year. Everyone was crying for me when the clock struck midnight and they told me to keep fighting.

    A week later, I got a call from the doctors saying they'd found a suitable donor (捐赠人). My wish came true and thankfully the operation went well. I spent four hours in surgery where they took out my old heart and put a new one in. When I woke up I burst out crying. I had a second chance at life.

    As years went by, I realized that one of the biggest problems of these adults are worry. A large majority of students were businessmen, executives, salesmen, engineers, accountants: a cross section of all the trades and professions—and most of them had problems! There were women in the classes — businesswomen and housewives. They, too, had problems! Clearly, what I needed was a textbook on how to conquer worry—so again I tried to find one.

    I went to New York's great public library at Fifth Avenue and Forty-second Street and discovered to my astonishment that this library had only twenty-two books listed under the title WORRY. I also noticed, to my amusement, that it had one hundred and eighty-nine books listed under WORMS. Almost nine times as many books about worms as about worry! Surprising, isn't it? Since worry is one of the biggest problems facing mankind, you would think, wouldn't you, that every high school and college would give a course on "How to Stop Worrying"?

    Yet, if there is even one course on that subject in any college in the land, I have never heard of it. No wonder David Seabury said in his book How to Worry Successfully: " We grow up with as little preparation for the pressures of experience as a bookworm asked to do a ballet (芭蕾舞)."

    The result? More than half of our hospital beds are occupied by people with nervous and emotional troubles.

    I looked over those twenty-two books on worry, reposing (靠) on the shelves of the New York Public Library. In addition, I purchased all the books on worry I could find; yet I couldn't discover even one that I could use as a textbook in my course for adults. So I decided to write one by myself.

    Shark attacks not only disturb beach activities, but can affect associated tourist industries. Shark nets are a common solution to preventing shark attacks on beaches, but they cause dangers to sea ecosystems.

    Seeking a cost-effective way to monitor beach safety over large areas, we have developed a system called Shark Spotter. It combines artificial intelligence (AI), computing power, and drone (无人机) technology to identify and warn lifesavers to sharks near swimmers. The project is a cooperation between the University of Technology Sydney and The Ripper Group, which is pioneering the use of drones—called "Westpac Little Ripper Lifesavers"—in the search and rescue movement in Australia.

    SharkSpotter can detect sharks and other potential threats using real-time aerial imagery. The system analyses video from a camera attached to a drone to monitor beaches for sharks, send warnings, and conduct rescues. Developed with techniques known as "deep learning", the Shark Spotter system receives imagery from the drone camera and attempts to identify all objects in the scene. Once certain objects are detected, they are put into one of 16 categories: shark, whale, dolphin, rays, different types of boats, surfers, and swimmers.

    If a shark is detected, Shark Spotter provides both a visual sign on the computer screen and an audible warning to the operator. The operator confirms the warning and sends text messages from the Shark Spotter system to the Surf Life Savers for further action. In an emergency, the drone is equipped with a lifesaving flotation pod (漂浮仓) together with an electronic shark repellent (驱逐装置) that can be dropped into the water in cases where swimmers are in severe trouble, trapped in a rip, or if there are sharks close by.

    In January 2018, the Westpac Little Ripper Lifesavers was used to rescue two young swimmers caught in a rip at Lennox Head, NSW. The drone flew down the beach some 800 meters from the lifeguard station, and a lifesaving flotation pod was dropped from the drone. The complete rescue operation took 70 seconds.

    We believe Shark Spotter is a win-win for both marine life and beachgoers. This unique technology combines dynamic video image processing AI and advanced drone technology to creatively deal with the global challenge of ensuring safe beaches, protecting environments, and promoting tourism.