Daily Chinese Idiom Guessing Game
To be able to recite or describe something very fluently and in great detail, as if counting one's own family treasures.
好象数自己家藏的珍宝那样清楚。比喻对所讲的事情十分熟悉。
柳亚子《二十世纪大舞台发刊词》某也贤，某也不肖，一一如数家珍。”
She knows the history of each painting in the gallery like the back of her hand, describing them as if 如数家珍.