叙述并指出申脉、中冲、四神聪的定位。
申脉:外踝直下方凹陷中。 中冲:中指尖端的中央。 四神聪:头顶部,当百会前后左右各1寸,共4穴
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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