Door!

"I'm curious about everything with regards to this child, but I am also worried about knowing too much. The kid is like a swamp; the closer you get, the greater the alert in your mind.

"The mother has bipolar disorder, and only when she is in the company of her son will she not act up. To facilitate treatment, the doctors bring the son to see her often. Every child has a natural reliance on their mothers. Even though he is so small, he knows that is his mother.

"However, the weirdest thing was, when the child saw his mother, the first thing he said wasn't mom or his own name but 'door'.

"Initially, I thought that I was mistaken, or maybe it was just a meaningless mumble by the child, but when the nurse carried him away, he used his tiny finger to point at the door to her mother's room and repeated the same word—door.