Nowadays people are putting our water supply in danger, because they use too much water or throw rubbish into the river. You may wonder how paving(铺砌) a road can lead to less usable fresh water. A major part of thewaterweuse every day is groundwater. Groundwater does not come from lakes or rivers. It comes from underground. The more roads and parking lots we pave，the less water can flow into the ground to become groundwater.

    Human activity is not responsible for all water shortages(短缺). Drier climates are of course more likely to have droughts(干旱) than areas with morerainfall，but in any case, good management can help to make sure there is enough water to meet our basic needs.

    Thinking about the way we use water every day can make a big difference，too. In the United States，a family of four can use 1.5 tons of water a day! This shows how much we depend on water to live，but there's a lot we can do to lower the number.

    You can take steps to save water in your home. To start with，use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher (洗碗机)only when it is full. Help your parents fix any leaks in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away.

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    Parents may think they're smart about where they store medicines, but their kids are smarter. Nearly 60,000 young children are rushed to the hospital every year after getting into medicines not meant for them, according to a new report from Safe Kids Worldwide.

    The report finds little connection between what parents know about storing medicines safely and what they actually do. Nine out of 10 parents know that medicines should be stored up and away out of reach and sight, but 7 out of 10 of them admit not doing that. They leave medicines out on kitchen counters, sinks and sofas, believing babies and toddlers(学步者)aren't tall enough or strong enough to reach them. Unfortunately, they probably can. Children as young as a month have ended up in an emergency department because they'd been poisoned by getting into a medicine that was left within reach.

Most poisonings related to medicines—particularly among babies and toddlers—occur within their home. Kids develop rapidly and they want to explore their environment. At certain ages they have a lot of hand-to-mouth activity, and so it's very common for them to explore their environment and then try to taste what they find.

    The new Safe Kids worldwide report includes a survey of 2,000 parents with children under age 6. While the number of children visiting an emergency department for accidental poisonings had declined since the 2010 maximum, the decline has slowed in recent years.

    Prescription and over-the-counter medicines cause the most severe poisonings, but vitamins and supplements(补充品)can also cause problems. There are steps families can take to lower the risk for an accidental medicine poisoning.

    Philadelphia offers a ton of attractions that are suitable for people of every age and here are some family—friendly attractions.

    Spruce Street Harbor Park

    Spruce Street Harbor Park, one of the best urban beaches in American, is an outdoor heaven on the Delaware River waterfront. Visitors can relax in a hammock, play on the playgrounds, and play games like table tennis and giant chess. Don't miss out on the park at night, when colorful LED lights hanging from treetops make the entire area bright.

    Blue Cross RiverRink

    Offering ice skating in the winter and roller skating in the summer, Blue Cross RiverRink creates a fun，outdoor experience for the whole family. Visitors can play on the nine-hole mini-golf course during the summer, and enjoy eats and drinks from the on-site (现场的) bar and restaurant all year round.

    Sesame Place

    Big Bird, Elmo and the other stars of Sesame Street come out and play at Sesame Place, the only theme park in the nation starring the popular TV show's most lovable characters. A water park, interactive activities，parades, fireworks and shows add to the fun.

    Once Upon a Nation Storytelling Benches

    On summer days, uniformed and professional storytellers at 13 storytelling benches throughout Philadelphia's Historic District entertain visitors with true, free, three-to-five minute tales about the colonial (殖民的）era as part of Once Upon a Nation . Children can pick up a Story Flag at any storytelling bench, and then collect a star from every storyteller on their journeys. Flags with all the stars can get free rides on the Parx Liberty Carousel at Franklin Square.

    Patients with light or moderate depression can be successfully treated by swimming with dolphins, researchers said on Saturday.

    The study was carried out in Honduras, including patients who were thought by the doctors with light of moderate depression coming from the United States and Honduras.

    For two weeks, half of the group swam and snorkeled (潜泳) with dolphins for an hour a day. At the same time the other half group carried out the same type of water activities, but with the absence of dolphins. Researchers want to find out the influence of water and the natural setting.

    All the study volunteers didn't continue to take any drugs or psychotherapy ( 心理治疗) at least for weeks before the start of the study and did not take any drugs during the study, said the researchers from the division of clinical Psychiatry at t e the University of Leicester Medical School.

    By the end of the study, those people who swam with the dolphins had a greater average reduction in their depressive symptoms than those who did not.

    The researchers noted that the study supports the theory of biophilia, which thinks that human health and well-being depends partly on the human connection with the natural world. The findings appeared in the issue of the British Medical Journal.

    Coming from the Greek, biophilia means “love of life”, and it has been developed by biologists to reflect the humans' natural tendency to connect with nature and animals, leading to interactions and positive emotions that result in psychological treatment.

    Siblings refer to one's brothers and sisters. We're attached to siblings as adults far longer than we are as children. Our sibling relationships, in fact, are the longest-lasting family ties we have.

    “Paul, my younger brother, and I, kind of annoyed each other when we were kids,” said Anna, an interviewee, “But as adults, we've always had each other's back, especially when dealing with our mother's health crisis. Paul is the first person I want to talk to when something worries me.”

    There's probably a biological explanation for the close bond of the sibling relationship. Siblings share half their genes, which biologists say should be motivation enough for each other's devotion.

    One thing that can weaken closeness in adulthood is a parent who played favorites in childhood; this sense of hatred can last a lifetime. The simple concept of parental favoritism was enough to shake their relationship.

    “What Paul and I are pretty sure is our parents treated us the same when we were growing up. Yet we're very different people,” Anna said,“ Paul is outgoing while I'm shy. Paul is an amateur pianist while I can't read music or carry a tune. In families with more than one child, every sibling seems to get a label in contrast to every other sibling.”

    The very presence of siblings in the household can be an education. When a new baby is born, the older sibling gains social skills by interacting with the younger, and the younger gains cognitively（认知角度地）by imitating the older. They learn from the friction between them, too, as they fight for their parents' attention. Mild conflict between brothers and sisters teaches them how to interact with friends and co-workers for the rest of their lives.

    It's so sad when things between siblings fall apart, which happens when aging parents need care or die — old feelings of contradiction and jealousy erupt all over again. Many families get through their parents' illnesses just fine, establishing networks where the workload is divided pretty much equally. But about 40 percent of the time there is a single primary caregiver who feels like she is not getting any help from her brothers and sisters, which can lead to serious conflicts.

    Throughout adulthood, the sibling relationship “is powerful and unchanged,” said Jane Mersky Leder, author of the new e-book The Sibling Connection. Whether we are close to our siblings or distant, she writes, they remain our brothers and sisters — for better or for worse.

    So remember the immortal（永恒的）words of folksinger Loudon Wainwright Ⅲ, in a song called Thanksgiving.“ On this brilliant occasion, this special family dinner, if I argue with a loved one, please make me…”

    Three men traveling on a train began a conversation about the world's greatest wonders.

    "In my opinion, "the first man said, "the Egyptian pyramids are the world's greatest wonder. Although they were built thousands of years ago, they are still standing. And remember: the people who built them had only simple tools. They did not have the kind of machinery that builders and engineers have today."

    "I agree that the pyramids in Egypt are wonderful," the second man said, "but I do not think they are the greatest wonder. I believe computers are more wonderful than the pyramids. They have taken people to the moon and brought them back safely. In seconds, they carry out mathematical calculations that would take a person a hundred years to do."

    He turned to the third man and asked, "What do you think is the greatest wonder in the world?"

    The third man thought for a long time, and then he said, "Well, I agree that the pyramids are wonderful, and I agree that computers are wonderful, too. However, in my opinion, the most wonderful thing in the world is this thermos."

    And he took a thermos out of his bag and held it up.

    The other two men were very surprised. "A thermos?" they exclaimed. "But that's a simple thing."

    "Oh, no, it's not," the third man said. "In the winter you put in a hot drink and it stays hot. In the summer you put in a cold drink and it stays cold. How does the thermos know whether it's winter or summer?"