A client receiving morphine for long-term pain management develops tolerance. When the client asks the nurse what it means, which of the following should the nurse response

A. "Tolerance is an allergic reaction to a medication. "
B. "Tolerance is an ability to take the same drug for extended periods of time. "
C. "Tolerance is an increased response to a medication. "
D. "Tolerance is a diminished response to a drug so that more is required to reach the same effect. "

血液的包装袋上应当标明的内容有（）。

A.血站的名称及许可证号

B.献血编号或者条形码

C.血型、血液品种

D.储存条件