Conclusion Students in high school showed higher rate of longing for sleep, and this implicated they fall short of sleep time greatly and siesta could improve their sleepy signs.

论与一般人群比较，中学生思睡的发生率极高，提示睡眠时间严重不足，午睡可改善其困倦现象。

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Conclusion Reduced vasodilator reserve or inappropriate vasoconstriction of the coronary microvessels are implicated as causes of microvascular angina.

结论微血管性心绞痛是由于小冠状动脉扩张贮备降低或异常收缩而导致的心肌缺血。

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