地高辛的t1/2为36h,若每日给予维持量,则达到稳态血药浓度约需

地高辛的t1/2为36h,若每日给予维持量,则达到稳态血药浓度约需
A.10d
B.12d
C.9d
D.2~3d
E.6~7d
正确答案：E