长期的战争经历使他处于一种持续的过度警觉状态，对任何异常的声响都会立刻做出反应。

His prolonged war experience left him in a state of constant ___hypervigilance, reacting instantly to any unusual sounds.

由于过度警觉，她难以入睡，总是担心房间里有危险。

Because of her ___hypervigilance, she couldn't fall asleep, always worrying about dangers in the room.