What are some observations that Melinda made on each floor?

Heart Attack:

It is crowded with gray-faced women twisting their wedding rings and watching the doors for a familiar doctor.

Maternity:

The maternity ward is dangerous because people there are happy.

Cafeteria:

I always thought hospital people would be real health nuts, but these guys eat junk food like it's going out of style.

5th Floor:

I sit where I can watch the nurses' station and, beyond that, a couple of hospital rooms. It looks like a good place to get sick. The doctors and nurses seem smart, but they smile every once in a while.