“Would you rather wait or come back later?” “ _____.”

A．I’d rather come back

B．Yes, I’d rather not wait

C．No, I’d rather wait

D．to come back

空腹下其胃内充满无回声液暗区，内有漂浮强光团和光点，看不到胃的蠕动波。是为胃扩张的声像图。