①意为悲伤;悲痛。____
②忧愁悲伤。____
③太阳和月亮像穿梭一样地来去。形容时间过得很快。____
④受到的启发或益处很大。____
代表作“三吏”“三别”《茅屋为秋风所破歌》的诗人是（ ）
All the students are advised to keep a ____ (balance) diet for their health.
