Tina Donaldson, CFA candidate, is studying yield volatility and the value of putable bonds. She has the following information: a putable bond with a put option value calculated at 0.75 (prices are quoted as a percent of par) and a straight bond similar in all other aspects priced at 99.0. Donaldson also wants to determine how the bond’s value will change if yield volatility decreases. Which of the following choices is closest to what Donaldson calculates as the value for the putable bond and correctly describes the bond’s price behavior as yield volatility decreases()

A. 99.75, price increases

B. 99.75, price decreases

C. 98.25, price decreases

不符合急性左心衰治疗原则的是

A．减少循环血量

B．减少肺泡内液体渗入，保证气体交换

C．增加左室心搏量

D．快速补充有效循环血容量

E．降低左房压和(或)左室充盈压