The customs in different countries are rather different. If I have dinner with a Chinese host, he always puts more food onto my plates as soon as I have emptied it. That often discomforts me greatly. I have to eat the food even if I don't want to, because it is considered bad manners in the West to leave one's food on the plate. I have already noticed that when a Chinese sits at an American's dinner party, he often refuses the offer of food or drink though he is in fact still hungry or thirsty. This might be good manners in China, but it is not in the West at all. In the United States, it is impolite to keep asking someone again and again or insist on his accepting something. Americans have a direct way of speaking, if they want something, they will ask for it. If not, they will say, “No, thanks.” When an American is fed with beer by the host, for example, he might say, “No, thanks. I'll take some diet, Pepsy-Cola(百事可乐) if you have it.” That is what an American will do. So when you go to the United States, you had better remember the famous saying: When in Rome（罗马）, do as the Romans do.

材料一：放飞青春，激发创造

中国青年网评论员杨丽在一篇题为《网创青春不可限》的网评中指出：“处处是创造之地，天天是创造之时，人人是创造之人，青年人有无限可能，不拘泥于已有的成果、不禁锢于繁杂的条条框框，不沉溺于舒适平庸的生活，敢于突破才叫青春。”“作出重大发明创造的年轻人，大多是敢于向千年不变的戒规、定律挑战的人，他们做出了大师们认为不可能的事情来，让世人大吃一惊。”当今，世界都期待青年们能靠着创新智慧，继续为人类开辟新的疆域，让世人“大吃一惊”。

材料二：青春飞扬，自强不息

身处青春，你会发现青春并不公平，青春充满着困难与挫折。当你用100%的态度面对时，收获或许只有50%；而你选择用50%的态度去对待它，或许最终将一无所获。若是选择安逸，久而久之，你会发现丢失了勇气，缺乏了毅力；反之，选择了奋斗拼搏，你就会明白自己想要的是波澜壮阔，即使前方黑浪涛天，也会有搏击长空的无畏无惧。因为真正的强者，不是没有眼泪，而是含着泪水依旧奔跑的人。当然，拥有梦想的同时也需要有强健的体魄，身体才是革命的本钱。告别慵懒和惰性吧，正能量才是青春该有的表现，积极一点，乐观一点，为你的梦想打造一副好载体，自然会发现真正的意义，受益终生！