12月19日，北京口腔医院新建主院区，患者在院内接受治疗。本版图片/北京口腔医院供图
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但技术趋势，并不自动等于个人机会。
Think about how you'd search a large room for a lost key. You wouldn't examine every square inch sequentially. You'd split the room into sections (by the couch, near the door, under the table) and rule out entire sections at a glance. "I didn't go near the kitchen, so skip that."