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• Use “ “ for phrases o [ “pediatric abdominal pain” ] • Use – to remove results with certain terms o [ “abdominal pain” –pediatric ] • Use OR to account for alternate terms o [teenager OR adolescent ]
脑电图（EEG）可以记录脑电活动。这项技术简单易行并且无痛。常需要在头皮上安放20个小贴附电极，先在正常情况下记录脑电活动。有时，患者会接受各种刺激，例如明亮或闪烁的灯光，以尝试引起癫痫发作。
