M: Excuse me, Madam. Is the air-conditioning on? This room is getting as hot as a furnace.
W: Sorry, sir. A new epidemic called SARS is threatening us right now. As a preventing measure, we are told to let in fresh air by opening the windows and not to use air-conditioners.
Q: What does the woman mean?
M: You look quite different from what you used to.
W: Sure. I started exercising regularly 2 years ago and went from 253 pounds to a healthy 160 pounds. And that's the only thing I did not give up halfway.
Q: What do we know about the woman?