Our room was on the second floor but you could still hear the roar of the ocean and see the stars at night. I used to take long walks along the water. The food in town was wonderful and the people were very friendly. The area was very quiet and peaceful, and fairly deserted.

    The last evening of our vacation, however, we all heard strange footsteps following closely behind us as we were walking up to our room in the holiday centre. We turned around and noticed a fairly young man moving very rapidly across the beach and getting closer to us. He was tall and wore a baseball cap. We couldn't see his face and he was approaching us very rapidly. The man's actions made my dad very nervous. Dad warned us that we'd better try to make it to our hotel room as quickly as possible. I didn't like my dad's voice; I could hear fear in it. It was late and we were all alone. We didn't have any cell phones on us. I never saw Dad as worried as he was then and I knew that something was terribly wrong. The sense of fear started to overwhelm Mom and me. We had had such a good time in town. Now, the night was rapidly turning into a dangerous situation.

    We could hear the man's footsteps getting closer. Dad's face was almost pale. The so-called intruder (侵入者) had moved nearer and nearer when all of a sudden, the nearby vending (自动贩卖) machine started going crazy and spitting out cans of soda! The noise actually scared the intruder and he ran out of sight. My parents were shaking, but we all turned around to see who had put money into the vending machine downstairs, and actually saved us, but no one was around at all. Not a soul.

    It's one vacation I will never forget.

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    Since 1984,Philadelphia has been cleaning up its act.One by one,graffiti（涂鸦）covered walls are being changed into outdoor art.So far,more than 1,800 murals（壁画）have been painted.Philadelphia now has more murals than any other American city.

    The walls that were once ugly with graffiti are now covered with beautiful pictures of historical heroes and modern art, thanks to the Mural Arts Program(MAP).Its work makes schools and public places attractive,and its citizens very proud.The program began as part of Philadelphia's Anti-Graffiti Network.Jane Golden is the MAP's artistic director."When people ask me what our program is about,"she says,"I answer them with one word: hope." Each year, the MAP offers youth art programs and workshops.Some onetime graffiti writers even help paint MAP murals.

    The MAP's work,says Golden,is all about developing a sense of community（社区）.When a neighborhood requests a mural,the MAP works with the people there to develop a message.Some messages have been "Safe Streets,"Love and Care," and "Peace Walk".

    The MAP receives up to 50 requests for murals each week. Last year, the workers painted 140 murals."The making of a mural enters people's collective memory as an extraordinary, pleasant moment in neighborhood history," says Golden, who began as a muralist in Los Angeles.

    Al was a skilled artist. One night, his older son developed a serious stomachache. Neither Al nor his wife took the condition seriously. But it was actually acute appendicitis (急性阑尾炎), and the boy died suddenly that night.

    Knowing the death could have been prevented if he had realized the seriousness of the situation, Al's emotional health became worse. Worse still, his wife left him a short time later, leaving him alone with his six-year-old younger son. The hurt and pain of the two situations were more than Al could handle, and he turned to alcohol (酒) to avoid the pain. Gradually Al became an alcoholic (酒鬼) and began to lose everything he had. Finally, Al died alone in a San Francisco motel room.

    When I heard of Al's death, I felt sorry for him. “What a complete failure!” I thought. “What a totally wasted life!”

    As time went by, I began to rethink my earlier judgment. I knew Al's son, Ernie, one of the kindest and most caring men I have ever known. I watched Ernie with his children and saw the free flow of love between them. I knew that kindness and caring had long come from somewhere.

    One day I worked up my courage to ask him. “I'm really puzzled by something,” I said. “I know your father was basically the only one to raise you. What did he do so that you became such a special person?”

    Ernie sat quietly and thought for a few moments. Then he said, “From my earliest memories as a child until I left home at 18, Al came into my room every night, gave me a kiss and said, 'I love you, son.'”

    What a fool I had been to judge Al as a failure. He had not left any material possessions (财产) behind. But he had been a kind loving father, and he left behind one of the finest, most giving men I have ever known.

    “An apple a day keeps the doctor away.” Similarly, if we drink a little more water every day, we may find that we need to go to the doctor a lot less often. A healthy diet is made up of water and a great many different kinds of foods. We know that healthy foods like fruits, vegetables and fish, are important as they provide us with energy and fiber, without giving us too much fat and sugar. But why is water important?

    The human body needs water to survive. Water is important as it carries poisons and waste out of our bodies. So, doctors advise us to drink plenty of water, much more than the small amount we need to stay alive.

    Some doctors believe that water is important for our health in all kinds of ways. They believe that a great many illnesses and health problems start as a result of dehydration(脱水)—a lack of water in the body. Most people are dehydrated at least some of time, although they probably don't know it. It is surprising to learn that if we feel thirsty, we are already in the first stage of dehydration. In fact, we are advised to drink water before we feel thirsty.

    These doctors think that health problems such as headaches, high blood pressure and asthma(哮喘) could be helped if people drink more water. They also believe that drinking more water can help people who are overweight. Water contains no calories so it will not make us put on weight. If we drink water, we will probably drink less sugary soft drinks such as Coca-cola. Doctors also believe that drinking more water may stop people from overeating. They say that many people think that they are hungry when they are, in fact, thirsty. Doctors suggest, therefore, that we eat less food and drink more water. There are still many health problems that cannot be solved by drinking water, so we should not stop going to seeing the doctor completely. However, if we make a decision to drink water every day, we may find that we need to go to the doctor a lot less often.

    In the past five years, Instagram has taken off faster than anyone would have ever expected. It has become more than just a social media platform; it has become a community. With this community of over 800 million people, there are two distinct sides when it comes to diet culture and weight-loss programs. These two sides are body positivity and body manipulation(操纵）

    I have run a food and lifestyle blog/Instagram for over two years, and I have experienced both of these sides shown through Instagram. I have followed accounts (账户) that have been about strictly counting their calories, and have looked at other people carefully for their food habits

    On the other side of this, the only accounts that I'll follow now are people who support intuitive eating, never calorie counting, and make sure to remind people that their weight is the least interesting thing. They try to remind people that food is fuel, rather than something that will make them lose or gain weight. This side of

    Instagram is what helps people suffering from eating disorders, rather than fueling them.

    The rise of Instagram also led to the rise of what we called" Instagram models. These people have a lot of fans and a very pleasant page on Instagram. Basically, this isn't a bad thing. Humans are attracted to attractive people. Where this does go wrong is when weight-loss programs, weight-loss products, and other people supporting different types of diets get in touch with these people and offer them pay to get their message across.

    We also run into issues with how the public thinks of and admires these people for only their bodies. Not only is it bad for the self-respect of the people viewing the account, but also for the mental health of the person running the Instagram account.

    The people that promote these products are usually attractive, with what we would consider "the perfect body and the products are almost always diet related in some way, which makes consumers believe that in order to reach this ideal body they must use this product.

    University of New South Wales has launched its new 12-month Women in Maths & Science Champions Program designed to give women the skills and confidence to build their public recognition and set up a connected network of women in maths and science. The first group of 30 female PhD students started in August this year, and the second group of 19 early- career researchers was formally announced yesterday.

    Over the 12 months, the champions complete at least 20 hours of related activities as part of a community of representatives who will influence and inspire women to pursue a career in maths and science. The activities are varied, ranging from visiting schools and conducting science presentations, to attending conferences and creating content for social media. At the end of the program, PhD champions have the chance to apply everything they've learned to the Postgraduate Research Competition. Above all, participating is a requirement for program completion.

    Rose O'Dea, a member of the first group, is a PhD candidate at the School of Biological, Earth and Environmental Sciences. She said, "I'm excited about the opportunity to work with school children. I hope to inspire some girls so they see not all scientists are older men in lab coals and that science is quite diverse and means different things depending on who you are."

    Dr. Mariana Mayer Pinto is an early-career researcher at the School of Biological, Earth and Environmental Sciences, where she mainly works with marine (海洋的) ecologists. She is originally from Brazil and said that being a woman from a developing country meant she knew the struggles that lack of role models can create. "You can't be what you can't see! I always have the hope that I can change the world bit by bit, and if one little girl says she can become a scientist because I talked to them, that'd be awesome, and that would make everything worth it."