Kate's father took her to the hospital to see her one-day-old baby brother. They drove there straight from school. Kate had never been inside a hospital before. ①This was a new experience for her.
At the gate there was a large sign listing all the departments of the hospital, with arrows (箭头) showing how to find them. When Kate saw the A&E department(急救室), she asked,“What do those letters stand for?”“Accident and emergency,” replied her father,
②“Last spring, I took our sister there because she fell off her bike,”
bc，且 ，则A＝( )