你有没有过这种体验：某件小事触发了一个巨大的反应，之后又像断电一样陷入麻木？这不是"情绪化"，这是神经系统越出了它的"容纳之窗"。
"As long as people are either hyperaroused or shut down, they cannot learn from experience. The brain structures that integrate past and present, that allow for a sense of causality and the ability to envision a future, are simply not fully operational."
Van der Kolk 用"窗口"这个词很准确：不是一道墙，而是一个范围。太高（焦虑、激动、失控）或太低（解离、麻木、空白）都在窗外。治愈，就是把窗口慢慢扩宽。
"The challenge of recovery is to reestablish ownership of your body and your mind — of your self. This means feeling free to know what you know and to feel what you feel without becoming overwhelmed, enraged, ashamed, or collapsed."
扩宽容纳之窗的方式包括：呼吸练习、身体运动、渐进式暴露——不是强迫自己"想通"，而是反复告诉神经系统：此刻安全。