听力原文：M: What did you think about the video we were supposed to watch for Professor Stephen' s class? W: I didn't see it. Was it good? M: Really it was. It was about stress, the effects of stress on the national health. W: It was interesting, right? M: Yes. I think they said that one out of nine women aged 45 to 65 will have a heart attack. W: I' m surprised at that. M: I was too. Oh, another thing. They said that women usually don' t get the same level of care as men do, so the heart attack is likely to be more serious. W: Why is that? M: Because many members of the medical profession still think of a heart attack as a male problem, so they don' t recognize the symptoms in women patients. W: Well, it does sound very interesting. I' m going to try to see it before class next time, so I'll be ready for the discussion. (23)