中文版：我想购买一款智能手表，请推荐一些品牌和型号。我主要关注健康监测（心率、血氧、睡眠）和运动记录功能，预算在1000-2000元之间，请推荐3款性价比高的产品。

英文版：I want to buy a smartwatch. Please recommend some brands and models. I mainly focus on health monitoring (heart rate, blood oxygen, sleep) and sports tracking functions, with a budget between 1000-2000 yuan. Please recommend 3 cost-effective products.

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