-John and I will celebrate our fortieth wedding anniversary next month.

-Oh,          ! [ ]

A.cheer up

B.well done

C.go ahead

D.congratulations

病毒性肝炎时，肝细胞凋亡的病变是()

A．肝细胞灶状坏死

B．肝细胞桥接坏死

C．肝细胞大片坏死

D．肝细胞嗜酸性坏死

E．肝细胞碎片状坏死