【正文】
rsquo。s unwele ! yes , however , very necessary .just image a world where stress does not exist and people lead their life in a very fortable way .but is this kind of living condition as perfect as we hope ? without stress , they may feel very satisfied with the current life but lack of power to discover new things .too much satisfaction result in nothing except a countermarch of the society .no stress , no development .so a certain amount of stress is good . it can stimulate us and increase