—I wonder what makes you a successful manager.

—I ________ as a waiter for five years，which contributes a lot to my today’s work.

A．serve

B．have served

C．had served

D．served

男性患者，40岁，丙肝后肝硬化7年，1周来腹胀、尿少，便秘，4h前出现嗜睡。查体：轻度贫血貌，巩膜轻度黄染，腹软，移动性浊音(+)。治疗肝性脑病时饮食每天应给予多少蛋白质

A．25g

B．30g

C．35g

D．40g

E．暂不给