单选题
In a hospital for the mentally ill, much of the nurse" s time is devoted to maintaining a safe environment for the patients and also helping them to understand and______essential safety measures.
【正确答案】
B
【答案解析】解析：句意：在精神病医院里，护士的大部分时间就是为病人提供一个比较安全的环境，帮助他们理解和采取一些必要的安全措施。put into practice实施，实行。take creditfor因某事受表扬，为…受到好评。hand down流传下来，传给。blend in调和，混合。