但是，在西方，人们送酒的时候都是只送一瓶。 One is quite enough, two are of course welcome but unusual and not expected. 因为他们吃饭的时候要喝客人带来的酒，如果客人拿了两瓶，似乎表明客人是个酒鬼，主人恐怕一瓶酒不够喝。
In the West , it is regarded as polite to open gifts as soon as they are given to express appreciation. In China, the situation is quite the reverse. Normally we Chinese feel that if you open the gift as soon as it is given, you might embarrass the person who gives the gift and you might be thought greedy. So Chinese people tend to open the gifts after the visitors have left. What is more, many people send gifts without wrapping them, and if they wrap them, they usually tell the receiver what is inside, and the receiver will thank the sender and put the gift aside without unwrapping them since they already know what is inside. However, when we receive gifts from an English native speaker, in order to avoid misunderstanding, we may follow their custom by opening the gifts in front of him or her and express our appreciation.