单选题 The passage wants to ______.

A、 tell patients what they can do and what they can't
B、 tell people when they can visit patients and when they can't
C、 give patients guidelines on how to treat their illnesses
D、 give people ideas on how to treat their illnesses

【正确答案】 A

【答案解析】这篇短文主要是向病人介绍住院期间需遵守的一些规定，也就是该做什么不该做什么，因此A选项是正确答案。