患者鲁某，男性，60岁。患病呃逆，呃声低弱无力，伴面色苍白，手足不温，纳食减少，神疲乏力，舌淡苔白，脉沉细弱。假若此病例呃逆不止，心下痞硬，可合用何方（）

A.旋覆花汤

B.旋覆代赭汤

C.半夏泻心汤

D.甘草泻心汤

E.生姜泻心汤

Assume an option free 5 percent coupon bond with annual coupon payments has two years remaining to maturity. A putable bond that is the same in every respect as the option free bond is priced at 101.76. With the term structure flat at 6 percent what is the value of the embedded put option

A．

B．

C．