整个背贴着躺在地上，脚板放平在地板上，两手放在身体两侧。
Lie on your back, feet flat on the floor, knees bent, hands at your sides.
小指尺侧无指固有神经背侧支。
拇指背尺侧动脉无紧密伴行的静脉。
The dorsoulnar artery of thumb had no closed veins to accompany with.
拇指背尺侧动脉无紧密伴行的静脉。
The dorsoulnar artery of thumb had no closed veins to accompany with.
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