Many patients are trapped in a revolving door of admission, discharge, and readmission.

　　許多病人陷入了入院、出院、再入院的怪圈里。

　　pounding on the door, she shouted at the top of her voice.

　　她一邊嘭嘭擂門，一邊大聲喊叫。

　　Opposite the front door was a staircase which I proceeded to climb.

　　前門對面是我接著要爬的樓梯。

　　The door was thrown open and a uniformed guard entered the room.

　　門被撞開后一名穿制服的警衛走進了房間。

　　She blew out the candle and groped her way to the door.

　　她吹滅了蠟燭，摸索著走到門口。