66. 王先生因冠心病入院接受血管繞道手術，術後照護目標，下列何者不適當？
(A) maintaining adequate perfusion pressure ( 60-80 mmHg )
(B) maintaining core body temperature higher than 37.5°C
(C) keep mixed venous oxygenation at 60%
(D) maintaining a cardiac index of 2.2 L/min/m2