answer: Dr. Lia Kwan answers #Person1#'s questions and gives a lot of useful solutions to solve computer-related injuries and problems.
documents: #Person1#: Our guest today is Dr. Lia Kwan. Dr. Kwan works with computer related injuries and problems. Dr. Kwan, do you see more computer-related problem these days?
  #Person2#: Oh, definitely yes. People are doing more and more with computers and that means more physical problems.
  #Person1#: So what can we do?
  #Person2#: Well, how you sit at the computer is very important. First, have a good chair. It should support your back well.
  #Person1#: OK, a good chair.
  #Person2#: And also your feet should be flat on the floor when you're sitting. You shouldn't cross your legs.
  #Person1#: OK. I don't always keep my feet flat on the floor at the computer.
  #Person2#: I know, it's hard sometimes. Anyway, you shouldn't sit too close to the screen either.
  #Person1#: Is half a meter away enough?
  #Person2#: Not exactly. You should sit about an arm's length away.
  #Person1#: What about the keyboard?
  #Person2#: The position of arms and hands should be relaxed on the keyboard.
  #Person1#: That's really helpful. Another advice?
  #Person2#: Yes, that all about sitting. The other thing is about not sitting. You shouldn't sit at the computer too long. Make sure you take breaks often and move around, too.
  #Person1#: Oh, that's really important and very helpful to us who work long hours at computers.