听力原文：Stress comes in all shapes and sizes, and has be come pervasive, it seems to pene

听力原文： Stress comes in all shapes and sizes, and has be come pervasive, it seems to penetrate everything and everybody. It's hard to get through a day without hearing or reading something about stress. Some doctors refer to stress as some kind of new plague. However, numerous surveys confirm that the problem has progressively risen since the 1980s. Why all the disorder？ After all, stress, has been around since Adam and Eve were in the Garden of Eden. Stress is an unavoidable consequence of life. Without stress, there would be no life. However, just as distress can cause disease, there are good stresses that balance this, and promote wellness. Increased stress results in increased productivity--up to a point. However, this level differs for each of us. It's very much like the stress on a violin string. Not enough produces a dull, harsh sound. Too much makes sharp, annoying noise, or causes the string to snap. However, just the right degree can create magnificent tones. Similarly, We all need to find the proper level of stress that promotes optimal performance, and enables us to make harmonious music. Good health is more than just the absence of illness. Rather, it is a very robust state of physical and emotional well being that acknowledges the importance and inseparability of mind/body relation ships. In the next program, I hope you will join me in the pursuit of learning how to exploit stress, so that it can work for you, and make you more productive, rather than self-destructive.

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A．The consequence of stress.

B．The negative effect of stress.

C．The realities of stress.

D．The positive effect of stress.