胸痹心痛
参考答案：
解析：胸痹心痛是由于正气亏虚，痰浊、气滞、瘀血、寒凝而致心脉痹阻不畅，临床以膻中或左胸部发作性憋闷、疼痛为主要表现的一种病证。
Drinking water, having a healthy diet and taking exercise are all positive ways to ________ you when you are working on a tight schedule.
A．relieve
B．refresh
C．liberate
D．comfort
Some people waste a lot of food ____ others haven't enough to eat.
A．once
B．when
C．as
D．while
