The legal age for drinking alcohol（酒精饮料） in the US is twenty-one. Underage drinking is not only a crime but also a common part of college social life. This week in our Foreign Student Series, we look at alcohol policies at American colleges and universities.

    The United States has more than 17 million students in higher education. Each year, 1,700 of them aged 18 to 24 die from alcohol-related road crashes and other injuries. 600,000 more are injured because of alcohol. And almost 700,000 are attacked by another student who has been drinking.

    Now, many schools have begun to strengthen（加强）their rules and college officials are trying to prevent too much drinking. Some researchers have found that students who think heavy drinking is normal often think that other students really drink much.

    At the University of Oklahoma, new policies came into effect after a nineteen-year-old student died from drinking too much at a party. Now alcohol is banned（禁止） from all university housing. Student organizations can serve alcohol at events but only on Friday and Saturday nights. And they must provide for transportation to and from off-campus parties. Other new requirements include an alcohol educational program that first-year students take online.

    The policies govern behavior on campus and off. With the first violation（违规）, students pay

75 dollars and their parents are told. They must also take an alcohol education class. They have to pay double if the behavior happens again. Those who violate a third time will have to be driven home for at least one term. The president of Oklahoma says the aim is not just to punish but to change the behavior and the culture at the university.

    It seems that you can hardly go to any bookstore without encountering Charles Dickens. From Oliver Twist to A Tale of Two Cites, Dickens' works still enjoy great popularity today and are placed on notable shelves.

    As someone who teaches Dickens, the question of why we still read him is often on my min. Nearly 10 years ago, I told my students that Dickens, works started crazes in Victorian readers. Then a hand shot up in the middle of the room. “But why should we still read his stuff?” A student asked. I was speechless because I had never considered the question myself. The answer I gave was only acceptable. “Because he teaches you how to think,” I said.

    The question annoyed me for years, and for years I told myself answers, but never with complete satisfaction. We read Dickens because he not only was a man of his own times, but also is a man for our times. We read Dickens because his exploration of the human mind is deep. We read Dickens because we can learn from the experiences of his characters. These are all wonderful reasons, but not exactly the reasons why I read Dickens.

    My search for an answer continued in vain, until one day a text message came from a student of mine. “We still read Dickens' novels,” she wrote, “because they tell us why we are what we are.” Simple as it was, that was the explanation I had thought for years.

    Like most people, I think I knew who I was without knowing it. I was Oliver Twist, always wanting and asking for more. I was Nicholas Nickleby, convinced that my father was watching me from beyond the grave. I was Pip, in love with someone far beyond my reach. I was all of these characters, and I began to understand more about why I was who I was because Dickens had told me so much about human beings. Dickens shines a light on who we are during the best and worst of times. That's why we still need to read him today.

    Who is smarter? A human being or artificial intelligence?

The question swept the world last week when a Google-developed program called AlphaGo defeated the world top player, South Korean Lee Se-dol, 4-1.

    So, what comes next?

    Some people have been arguing that artificial intelligence, or AI in short, will be a bad thing for humans. In an interview with the BBC in 2014, UK scientist Stephen Hawking warned that “The development of full artificial intelligence could mean the end of the human race.”

    So are we really about to live in the world shown in the Terminator movies?

    “Not quite,” answered The Economist. After all, it's not hard to get a computer program to remember and produce facts. What is hard is getting computers to use their knowledge in everyday situations.

    “We think that, for the human being, things like sight and balance(视觉平衡), are natural and ordinary in our life.” Thomas Edison, founder of Motion Figures, a company that is bringing AI to boys, told the newspaper. “But for a robot, to walk up and down just like human beings requires various decisions to be made every second, and it's really difficult to do.”

    As The Economist put it, “We have a long way to go before AI can truly begin to be similar to the human brain, even though the technology can be great.”

    Meanwhile, John Mark off of The New York Times said that researchers should build artificial intelligence to make people more effective.

    “Our fate is in our own hands,” he wrote. “Since technology depends on the values of its creators, we can make human choices that use technology to improve the world.”

    Buster used to be a lovely dog playing and running on a farm all day. His life had a big change after his handler Will's presence because Will found he did extremely well in sniffing tests. Will thought Buster had a special talent and decided to let him become a member of RAF police working dogs. Buster began working with Will in 2007, and the pair was sent to Afghanistan's deadly Helmand province. There, Buster saved countless lives by sniffing out explosive devices (IEDs), as well as weapons. He joined his comrades repeatedly on foot patrols hunting Taliban terrorists and tracking down bombs. He also acted as a useful diplomatic tool, due to his friendly approach to local children. The RAF soon had a long train of children in tow, as Buster drew in his crowd and entertained them.

    After his glittering service with the RAF, Buster retired in 2011,and died in 2015 at the age of 13 at the home of his handler, Will, in Lincolnshire where he had been enjoying retirement with his handler Will, his wife Tracy and their two dogs who will inherit (继承) their father's career.

    Over the course of his career, Buster is thought to have saved more than 1,000 lives. He also helped patrol British bases and searched vehicles at check points, and upon retirement was made the official RAF Police mascot (吉祥物). Buster's brave exploits were even documented in Will's book, which was published in January and soon became a best-selling one.

    Buster completed five tours of duty in Afghanistan, Bosnia and Iraq and earned a row of campaign medals, and it was because of his great efforts in these austere environments full of wars and confrontations that he would be remembered. It was the saving of countless lives by searching out IEDs that saw the honor of official lifetime mascot of the RAF Police bestowed (授予) upon Buster. The RAF police are now planning to commemorate Buster as part of a special event to celebrate RAF Police Working Dogs.

    Backcountry for beginners: the best destinations in Canada

    When carried out safely, your first backcountry trip will leave you lifelong memories, opening a getaway into nature. But the leap from car camping to backcountry requires preparation and learning. Here are some recommended trips for backcountry beginners:

    Grundy Lake Provincial Park

    The park's 9 backcountry sites are a 30-minute paddle (划船) away. Grundy Lake is motor-boat free. Your sites are quiet enough for a true backcountry trip. Each site comes equipped with a fire pit (坑) and a picnic table.

    Bon Echo Provincial Park

    Many visitors don't know about the 25 canoe-in campsites located on Joeperry and Pearson Lakes. A short canoe trip of 30-minute will get you to your campsite. At each campsite, you will find a picnic table, tent space and a toilet nearby.

    Charleston Lake Provincial Park

    Experience the best of the Canadian Shield, and hike or paddle your way to 10 backcountry campsites. Travel time can range from 10 minutes to 2 hours. All sites come equipped with elevated tent platforms, a picnic table, a fire grill, and a toilet.

    Murphys Point Provincial Park

    Paddle through Big Rideau Lake (part of the historic Rideau waterway) to access 14 backcountry campsites. Most are located 5-45 minutes away from the boat launch. You'll find a picnic table, tent space, and a pit toilet nearby each site. Paddle back to visit Murphys' piece of living history: the Mica Mine!

    Remember: backcountry travel requires careful consideration of packing, route planning, meal planning, safety, and your skill level.

Westwinds Farm Campsite

    Open April - September

    (Booking is advised for holidays in July and August to guarantee a place.)

    Jim and Meg Oaks welcome you to the campsite. We hope you will enjoy your stay here. We ask all campers to show due care and consideration whilst staying here and to observe the following camp rules.

    Keep the campsite clean and tidy: dispose of litter in the bins provided; leave the showers, toilets and washing area in the same state as you found them; ensure your site is clear of all litter when you leave it.

    Don't obstruct rights of way. Keep cars, bikes, etc. off the road.

    Let sleeping campers have some peace. Don't make any noise after 10 o'clock at night or before 7:30 in the morning.

    Dogs must be kept on a lead. Owners of dogs that disturb other campers by barking through the night will be asked to leave.

    Disorderly behavior will not be tolerated.

    The lighting of fires is strictly prohibited.

    Ball games are not allowed on the campsite. There is plenty of room for ball games in the park opposite the campsite.

    Radios, portable music equipment, etc. must not be played aloud.

    The management reserves the right to refuse admittance.