-Hello, John. This is Alice. I’m calling from work. How’s your mother feeling?

- ________. Mum is out of hospital, but she has to stay in bed a few more days.[ ]

A. You’re welcome  

B. By all means

C. What a pleasure  

D. That is thoughtful of you

简述二类高层民用建筑中火灾自动报警系统的设置场所。