The Renaissance，considered by modern scholars to have been the time between 1,300 and 1,600，was a period of European history when many new inventions and beliefs came into being.

    The Renaissance is traced back to rich Italian cities such as Florence，Milan，and Venice.In these cities businessmen started to spend their extra money on things like painting and education，and to consider new techniques of banking and systems of government.A new type of scholar，the humanist(人文主义者)arose.Humanism was concerned with humankind and culture.Latin and Greek，literature and philosophy，music and mathematics were among the subjects humanists studied.

    The Renaissance gave rise to new forms of painting and  sculpture.During  the  Renaissance，artists were no longer regarded as mere artisans(工匠)．Many artists drew on mathematics in order to become more accurate in their measurements(度量)and to make sure an object was presented in realistic proportions.They also studied the way light hits objects and the ways our eyes perceive it.A new kind of paint，called oil paint，was invented.

    The Renaissance affected all of the society.Many people became interested in politics，and the world outside their towns.They became explorers，businessmen，etc.The effect on religion was especially strong.In the Middle Ages people were primarily concerned with serving the church and getting to heaven.But the increase in arts  and education gave  people things to look forward to in life，and made them lose interest in the church.

    The  Renaissance  produced  many  great minds.Leonardo da Vinci was one of the greatest，although he was not regarded that way at the time.Among his many works of art were Mona Lisa and The Last Supper.He is also regarded as a great inventor，and is credited for coming up with the idea of the helicopter.

    Among a group of middle-aged men and women，who were discussing bringing about quality education(素质教育)，was a young man dressed in a white shirt．Within minutes, he was called onto the dais(讲台)．Twenty-two-year-old Babar Ali was surrounded by educators from across India．He was popularly known as the world's youngest head teacher．

    The school that Babar started in poor Bhabta village has completely changed．When he was nine years old, he had only eight students in his school．Now the school has 300 students and 10 teachers. The school is called Ananda  Siksha  Niketan. It is recognized by the West Bengal government．

    Today Babar is a student in the morning．He is learning English literature at Berhampore Krishanath College．But he comes home in the afternoon to teach his students．

    Baber was discussing education at the National Summit on Quality in Education(NSQE)．The meeting was held in Bangalore，capital of Karnataka State in southern India．

"It all started as a game when I used to teach my sister, my first student, in my backyard．Later, some children from the village often came to my classes and that was how the school was born," he said．

    His biggest achievement is that six of his students have now started teaching in his school after their college hours．

    In another month, Babar's dream of a school building will soon come true．Many people, a large part of whom are from Karnataka，have helped him realize the dream．They have given his school a lot of money．   

Although he has received so much attention and recognition(认可)，he is still not fulfilled ． "There are people in my village who do not go to school．And there is a long way to go as so many children still need to receive an education，"he says．

    In 1971 a young man who grew up very poor was travelling across the country, trying to make a new start for himself. Along the way he had completely run out of(用光) money and was forced to spend the night in his car. This continued until one morning, after a week of sleeping in his car, he walked nervously into a restaurant and ordered a big breakfast.

    After eating his first good meal in weeks, he found himself lying to the waiter, telling him he had lost his wallet. The waiter, who was also the owner, walked behind the chair where the young man had been sitting. He bent down, and came up with a $20 bill that looked as if it had fallen on the floor and said, “Son, you must have dropped this,” the owner said. The young man couldn't believe his luck! He quickly paid for the breakfast, left a tip, bought gas with the change, and headed West.

    On the way out of town, he began to understand what the owner did. Maybe nobody dropped the money at all. “Maybe that fellow just knew I was in trouble and he helped me in a way that didn't embarrass(使尴尬) me. So I just made a promise to help other people if I can.”

    Later, he worked very hard and became a rich man. Now he lives near Kansas City. Each year he gives away thousands of dollars. He is known as the “Secret Santa” because at Christmas time each year, he personally hands money out to those on the street and at restaurants. Last year, he gave more than $50,000 away in Kansas City.

    Increasingly, over the past ten years, people-especially young people have become aware of the need to change their eating habits, because much of the food they eat, particularly processed food, is not good for the health. Consequently, there has been a growing interest in natural foods: foods which do not contain chemical additives and which have not been affected by chemical fertilizers（化肥）widely used in farming today.

    Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount but not the quality of foods grown in commercial farming areas.

    Natural foods also include animals which have been allowed to feed and move freely in healthy pastures（生活状况）. Compare this with what happens in the mass production of poultry（家禽）: there are battery farms, for example, where thousands of chickens live crowded together in one building and are fed on food which is little than rubbish. Chickens kept in this way are not only tasteless as food; they also produce eggs which lack important vitamins.

    There are other aspects of healthy eating which are now receiving increasing attention from experts in diet. Take, for example, the question of sugar. This is actually a nonessential food! It is not that sugar is harmful in itself. But it does seem to be additive: the quantity we use has grown steadily and in Britain today each person consumes an average of 200 pounds a year! Yet all it does is provide us with energy, in the form of calories. There are no vitamins in it, no minerals and no fibre.

    Bargain hunters spent a record of 168.2 billion yuan ($25.3 billion; 21.7 billion euros; ￡19.3 billion) during the 2017 Singles Day on Nov. 11, the world's largest daylong discount festival, as e-commerce giant Alibaba Group took online shopping to offline stores and beyond(超越) the nation's borders(边界).

    Spending climbed by 39.3 percent during this year's sale, as consumers from 225 countries and regions scooped up goods from 140,000 brands (品牌)that offered promotions during the annual event.

    Alibaba surpassed last year's 120.7 billion yuan total shortly after 1 pm, as overseas shoppers joined in the afternoon, seeking good deals from China. Expanding at a faster-than-expected pace, the total eclipsed (使黯然失色) the combined sales of Black Friday and Cyber Monday in the United States last year. Nine out of ten people used mobile wallet apps for payment, says Alibaba, with its Alipay app having handled 1.48 billion transactions (转账) in 24 hours and processed them at a peak rate of 256,000 transactions per second.

    Meanwhile, some offline shops also joined in, turning into smart stores that allowed shoppers to track product availability at other locations and get timely delivery to their doorsteps while paying with their phone. "Using big data analytics powered by Chinese tech firms can help us locate customers in a precise manner, something we wouldn't have achieved using old-school retailing," says Gary Chu, e-commerce general manager.

    The Nov. 11 shopping event represents a China-branded business model that can also be spread to other countries, creating opportunities for businesses worldwide. As Singles Day grows, shoppers have used the opportunity to try out new items rather than simply bagging a bargain, says Tommy Hong, vice-president of Nielsen China.

    "That changing attitudes (toward Singles Day) is also consistent with China's shifting focus from quantity(数量) to quality growth," Gary Chu says.

    People have different ways of dealing with a common cold. Some take over-the- counter(非处方的) medicines such as aspirin while others try popular home remedies(治疗)like herbal tea or chicken soup. Yet here is the tough truth about the common cold: nothing really cures it.

    So why do people sometimes believe that their remedies work? According to James Taylor, professor at the University of Washington, colds usually go away on their own in about a week, improving a little each day after symptoms peak, so it's easy to believe it's medicine rather than time that deserves the credit, USA Today reported.

    It still seems hard to believe that we can deal with more serious diseases yet are powerless against something so common as a cold. Recently, scientists came closer to figuring out why. To understand it, you first need to know how antiviral(抗病毒的) drugs work. They attack the virus by attaching to and changing the surface structures of the virus. To do that, the drug must fit and lock into the virus like the right piece of a jigsaw(拼图), which means scientists have to identify the virus and build a 3-D model to study its surface before they can design an antiviral drug that is effective enough.

    The two cold viruses that scientists had long known about were rhinovirus(鼻病毒) A and B. But they didn't find out about the existence of a third virus, rhinovirus C, until 2006. All three of them contribute to the common cold, but drugs that work well against rhinovirus A and B have little effect when used against C.

    "This explains most of the previous failures of drug trials against rhinovirus," study leader Professor Ann Palmenberg at University of Wisconsin-Madison, US, told Science Daily.

    Now, more than 10 years after the discovery of rhinovirus C, scientists have finally built a highly-detailed 3-D model of the virus, showing that the surface of the virus is, as expected, different from that of other cold viruses.

    With the model in hand, hopefully a real cure for a common cold is on its way. Soon, we may no longer have to waste our money on medicines that don't really work.