Excuse me , ma'am . Can you tell me where the nearest postoffice is ?   Of course . Go straight ahead . Turn right at the next street . You'll see a tall , yellow building.The post office is on the first floor .   Do you mean that I go that way for one block , then turn right ?   Yes , you are right .   Is it far ?   No , It's only about five minutes ' walk .   Thank you very much .   It's my pleasure . 