Big data (数据) is a lot of sets of information that are put together so they can be used by a computer program. The computer program looks for different kinds of answers or patterns in the data. Big data can have different kinds of information from many sources, such as information that comes from schools, social media sites, companies, and governments. One set of data can have people's names and addresses. Another set can have what they like, where they go to school, and how much time they spend on the computer.

    Big data can be used in many ways. The government uses it to understand how many people travel on buses or trains. This information is then used to make bus or train systems better. Some schools use big data to understand which children may need extra help in class. The teacher can then give certain students more help or support so those students can succeed in school. Companies use big data, too. It helps them understand who buys their products. For example, one company uses weather data to see when people eat the most ice cream.

    Big data can be used for good reasons. Some hospitals use big data to predict if a baby who is born too early will get sick. The hospital can then take extra steps to take care of that baby so he or she does not get sick. Big data can also be used for bad reasons. It can be used to predict which kinds of people are likely to break the law or hurt others, even if they have not done anything wrong.

    How can big data be used for good and bad things? It is because the computer programs used to look at big data and understand it are written by people. People think a certain way. Because they think a certain way, they build a model of those ideas. These ideas are then used to look at the data. Sometimes, these ideas are helpful for people or businesses. Other times, bad ideas can cause problems for certain groups of people.

    Me Before You is my favorite romance(浪漫)novel by British writer Jojo Moyes. It tells the story of Louisa Clark and William Traynor (known as Will). At the end of the book, Will dies and leaves Louisa a lot of money. What happens next？You can find out in the book's sequel(续集)After You.

    Will wants Louisa to use the money to live her life happily and richly—to travel, discover new chances and continue her education. However, Louisa is too sad and finds it difficult to forget Will. Louisa now works at a bar in an airport, watching people fly to amazing places. Her boss is really unfriendly and she lives in an apartment that doesn't feel like home.

    However, all of this is about to change. One night, Louisa meets a girl at her doorstep(门阶). She tells Louisa where she is and Louisa can't believe her cars. If she closes the door, her life will stay the same. If she opens the door, she will accept challenges and become the woman Will wanted her to be. Which will she choose？You'll have to find out the answer for yourself.

    Jojo Moyes wrote After You because she wanted to give her characters from Me Before You a future. Her use of language is as descriptive(描写性的)and powerful as that in Me Before

    You. One special quote(引文), "Because me being here sort of means you're still here", deeply touched me. I think this line is really emotional(有感染力的)and powerful.

    One would think that campers would know not to break the branches off trees for firewood, drive fast around the campground, litter, or leave a fire not looked after, but I've seen people do all of these things. No matter where you put up your tent, here are five things not to do at a campground.

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    What's it like to be near someone who decides to arrive late at night? Last summer, on a rainy night at a state park in Vermont, we heard noises from excited kids and barking dogs very close to our tent after midnight. There is no beautiful way to set up camp in the middle of the night, so please, just don't do it.

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    No one thinks that his dog is annoying, but we all know that some pets are better off left home. The only thing worse than a camper who stands by lazily as his dog barks at passers-by for no reason at all, is that he leaves his dog at his campsite while he goes off for the night.

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    This is the most important and often unnoticed camping manner in the book. Nearly every campground has rules that do not allow noise late at night and early in the morning, but most places also don't have the staff to carry them out.

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    You might accept leaving your bar of soap thinking that someone might have forgotten to bring theirs, but I can assure you that non one wants to use your leftover soap especially if it's hairy, so please take it with you.

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    No matter how good your taste in music is, I'd say most people prefer quiet hours with the nature. The truth is that no one want to hear your music except for yourself. Headphones are a great invention, but since too many campers fail to pack them, don't forget your earlugs.

    For most of us, the days are divided into day and night. But for two months each winter in Northern Norway (挪威), it's dark for 20 hours a day. There is no sunrise or sunset because the sun never gets above the horizon (地平线) .

    Would you like to live in darkness for this long? It may seem difficult, but many people in Norway love the beautiful colors of these months.

    To the south are the red and gold colors of the horizon. To the north, the sky is a special blue. Even the moon and the stars look blue. In the towns, the lights in the streets shine like little yellow diamonds.

    People do need light to be healthy and happy. Since they don't have much daylight during this time of the year, they exercise and eat foods with vitamins (维生素) A and D, people usually get energy from being in the sun.

    And darkness doesn't stop people there from having a good time. Each winter, some people are skiing on hills and skating on ponds that are lit up. Others are going to film and music festivals And other people are spending time with friends in cafes and restaurants. Of course, not everyone is so active in the dark months. Many people are just going to sleep a little earlier until the sun returns in spring.