求翻译：　　进行控水处理，利用头低、脚高的体位将呼吸道及消化道内水分倒出。最简单的方法是救护者—腿跪地，另—腿屈膝，将病人腹部横置于救护者屈膝的大腿上，将头部下垂，然后按压其背部，使呼吸道及消化道内的水倒排出来；也可将患者俯卧于地面的自然斜坡上，头居下方，使水流出是什么意思？

The control of water treatment, low head and foot-high position to the respiratory and digestive tract of water poured out. The easiest way to the ambulance - legs down on their knees, to another - Tuiqu Xi, patients with abdominal cross ambulance knees thighs, head drooping, and then press the back

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　　Water treatment, using low head, feet high positions within the respiratory tract and digestive tract of water poured out. The simplest method is the ambulance-legs on my knees and legs-knees, patients with abdominal transverse in the ambulance on the knee thigh, head drooping, and then press the