单项选择题

请根据下面短文回答下列问题：
You find a piece of paper outside your door today. Read it carefully and you may find it quite important to you.
YOUR BUILDING SERVICE
We help people in this part of the city by:
* checking all plans (方案) before people build new houses or make changes to old ones;
* checking water pipes (管道);
* looking at any problem buildings and making sure that they are all right.
We check 900 building plans each year.
We look at 700 building places each month to see if things are going on well.
WHERE CAN YOU GET MORE DETAILS
The Building Service is at the City Hall, Kenton, CN1 6KJ.
Telephone: 676316 or 676317
We have office hours for people to come and talk about problems.
HELP US TO HELP YOU
If you do building work, please think of other people.
Be nice to people living next door.
If you want to talk to us about your problems, please give as much detail (细节) as possible.
If you see any building problems, please let us know right away.
WHAT YOU CAN DO IF THINGS GO WRONG
If you are not happy with us and have anything to say about the Building Service, please come, phone or write to The Planning Office, City Hall, Kenton, CN1 6KJ.
Telephone: 676317 "Help us to help you" means "______."