Greetings--寒My mother used to be a professor of English and taught me English when I was a kid. She told me that English-speaking people,including,I think,the British and Americans,are generally courteous and they tend to greet one another a lot. The first rule I leed was when you meet someone you dont know,you should say how do you do?And the other person would reply with how do you do?But when you meet someone you know,you should say how are you? The other person would respond Im fine,and how are you?I followed this rule faithfully,that is,until I came to the US a few years (quite a few years) ago.