Thousands of persons in Peru are suffering from the disease cholera. Medical experts say it is the first time in their century that cholera has reached the western part of the world. The Untied States Centers for disease Control says the kind of cholera has been spreading throughout the world since 1961. It was discovered that year in Indonesia. Since the first case in Peru, more than sixteen thousand people have been affected and about one hundred have died.

    Cholera is caused by polluted food and water. People become infected (传染 ) when they eat the polluted food or drink the polluted water. If untreated immediately, they may die within hours. Most victims however , can be saved. treatment includes drugs and replacement of body fluids ( 液体) directly into the blood.

    Medical researchers have developed a vaccine ( 菌苗) medicines to protect against cholera. But the vaccine is only about 50% effective. And it protects against cholera for only about six months. Medical experts say the best way to fight cholera is to prevent it. They also say people should not eat uncooked food or food that has not been cooked long enough. People who live in areas where cholera has been found should wash their hands before eating and cooking. They should drink only water that has been boiled or made pure with chemicals.

    Hidden from the noise of Washington, D.C., Hillwood Museum is a special treasure. It contains (包含) one of the finest personal collections (收藏) of Russian and French art in the world.

    Hillwood Museum was once the home of Marjorie Merriweather Post. She was a rich businesswoman. She owned one of the largest food companies in the United States. She was also very interested in collecting beautiful French art and furniture.

    She moved to Russia in the 1930s as her third husband, Joseph Davies, became the American ambassador (大使) in Moscow. Marjorie Merriweather Post had a love for Russian art as well. She bought the house in Washington in 1955 and she wanted to make it into a museum after her death. Many art experts helped Mrs. Post create its fine collection.

    Hillwood has many rooms which are filled with her treasures. Visitors can see beautiful music boxes from the eighteenth century and colorful paintings of European princesses (公主). Experts say the ancient wood and gold furniture from France is some of the finest ever made. Visitors can even look at Mrs. Post's jewels and clothes.

    The museum also has several beautiful gardens. One is designed like the gardens in Japan. It has a bridge and visitors can watch flowers floating in the water. Flowers are also grown all the year in a special glass building or greenhouse. These flowers are placed in the house throughout the year.

After a walk, visitors can rest at a nearby eating place. They can also buy objects to remember this special museum.

    The human beings seem to be facing a crisis （危机）． After Our best Go players were defeated one by one by the artificial intelligence (AI) AlphaGo, we lost our pride of being at the top of the intelligence chain. And in October，when Saudi Arabia gave citizenship to a robot named Sophia, another privilege of being human was take away．It looks like everything that separates humans and AI is at risk fight now．

    But we keep hoping that instead of “everything ”, there's still something left in us that makes us irreplaceable.

    To Hao Jingfang, winner of the 2016 Hugo Award for Best Novelette, that “something” is our consciousness. “AlphaGo is intelligent in a certain way, but not intelligent enough to ask the important questions – Do I like playing Co? Do I want to play Go today? Why do I have to play Go when you tell me to?” she once said．In other words, computer programs don't have a choice to say “no”． They probably don't even know what a “choice” is – all they ever do is calculate．

    And to He Huaihong，a philosophy (哲学) professor at Peking University，imagination and creativity are also what make us special. A machine couldn't have come up with the theory of gravity just because it was hit by a falling apple，he said．It's human imagination that connects what seem to be completely random and irrelevant concepts，something that a machine—which works by fixed rules only—can't do，at least for now．

    This is why BBC reporter Viktor Mayer-Schonberger suggested that instead of focusing on how computers have overshadowed us on calculating abilities than humans，we should probably “consider our quality at a different end of the spectrum (光谱)：creativity，originality (原创性)，even plain illogical craziness，instead of hard-nosed (顽固的) logic”，he wrote．

    So maybe in the future，as artificial intelligence becomes even more intelligent，humans and A1 will learn to use each other's talents for good．If AI can handle the boring tasks like calculating and driving for us，we'll have more time to create，think，and be busy with “being human”．

    This activity will melt away the pounds, build your body and leave you on an emotional high. Yet the form of exercise, the fitness trend of the year, does not require gym membership or a personal trainer. All you need to do is walk.

    “Walking is a refreshing alternative to complicated aerobic ( 氧) routines and overpriced gym membership,” says personal trainer Lucy Knight, author of a new book on the exercise. “It is free, enjoyable and already a part of everyday life. All you need to do is correct your technique, walk faster and for longer and you will lose weight.”

    There is much evidence of the benefits of walking. Scientists at the University of Pittsburgh recently discovered that overweight people who walked briskly ( 快) for 30 to 60 minutes a day lost weight even if they didn't change any other lifestyle habits. Another American study found that people who walked for at least four hours a week gained less weight than couch potatoes as they got older. Researchers at the University of Massachusetts medical school found that people who walked every day had 25 percent fewer colds than those who sat a lot. Best of all, walking makes you feel good about yourself. “For people suffering from depression, walking three to four times a week for 30 minutes has been shown to lift their mood,” says Knight.

    But how to walk your way to weight loss and wellness? Health experts recommend that we should walk 10,000 steps a day to stay healthy. Actually you would probably need to walk at least 16,000 steps a day to lose weight. “Your workout plans depend on your level of fitness. You should aim to progress by increasing your walking time by five minutes every two weeks, and walk a bit faster. In just three months, the results should speak for themselves,” says Knight.

    For tourists holding the Barcelona Card, the information below will be useful if you plan to admire some artworks or architectures there.

    Sagrada Familia

    Opening hours: 09:00-18:00(October-March); 09:00-20:00(April-September)

    Admission: 11, or 11, or 10 with the Barcelona Card

    The project's vast sale and its special design have made it one of Barcelona's top tourist attractions for many years.

    La Pedrera

    Opening hours: November-February: 09:00-18:30; March-October: 09:00-20:00

    Admission：$ 9.50. Save 20% with the Barcelona Card.

    It is a unique modernist building made of bricks and colorful tiles（瓦）. Visitors can see the amazing 800 square meters attic（阁楼）with 270 brick arches that give you a feeling that you are walking inside the skeleton of a whale.

    Barcelona FC Museum

    Opening hours: 6th April-4th October:10:00-20:00;the rest of the year. 10:00-18:30

    Admission：$8.50 for entry to the museum and $17 for a guided tour.

    When you buy your ticket you have two options: a ticket for the museum to see the football stadium or a special one for $15 where you get to see the stadium and the scenes at the club.

    Picasso Museum

    Opening hours: Check the website for details as they vary depending on the time of the year.

    Admission：$9 for main exhibition-extra for special showings. Save 50% with Barcelona Card.

    The museum has arranged Picasso's paintings from his early days to his final works. Arranging the paintings in this way gives you a fascinating insight into the development of Picasso.

    Nhon Ly, a 55-year-old Vietnamese-born professional bodybuilder from California has been awarded the "real-life Master Roshi" for his unbelievable similarity to the popular Dragon Ball Z anime(日本动漫) character.

    Ly certainly doesn't look like any other typical 55-year-old man. In fact, he looks a lot better than most guys in their 20s, with his lean(瘦且健康的), strong muscles and youthful attitude. But he's absolutely not the only 50-something man who has the strong muscle in the world.  What really sets Nhon Ly apart from all the rest is his unbelievable similarity to Dragon Ball Z character Master Roshi, also known as the Turtle Hermit, in his "final form". And he apparently liked the comparison so much that he even set his Instagram handle as @master_ roshi_ real_ life.

    According to Madness Media, Ly immigrated to the United States in 1980, at the age of 16. He got a job as a pedicurist(修脚师) at a nail salon, and worked his way up to salon owner. Although he has achieved so much, bodybuilding has always been his biggest love. He has competed in several professional bodybuilding events, with his most notable results being the 4th place at the 2011 US Championship, the 7th place at the 2012 edition, and the 5th place at the 2015 Nationals.

    Even at 55, Nhon Ly continues to train hard in the gym in order to keep his Master Roshi look. He also likes to share photos and videos with his 40,000 fans, many of whom are Dragon Ball Z fans. They routinely post a large quantity of comments, thanking him for training Goku, who is the main character in Dragon Ball media, and asking him to train them in the art of bodybuilding.