手机的创新速度，随着手机形态的挖掘和现有科技的限制，大大降低，这个社会与行业的共识已经基本形成。在现有的产品形态下，指望智能手机还能像早期那样，掏出接踵而至的大创新，几乎是不切实际的幻想。
const blocking = Stream.push({ highWaterMark: 2, backpressure: 'block' });
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A spokesman for the firm added: "The wellbeing of our patients and the satisfaction of our customers are top priorities. We deeply regret that there are currently delivery delays affecting our medical bone cements."
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A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.