This is my school. There are many trees and flowers in it. It's very beautiful. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room. There are 1,200 students and 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too

小明在地图上测量、计算，发现从香港往北到北京和从连云港向西到新疆的铁路路程实际距离分别达2 500多千米和4 000多千米。我们可以感受到的是(    )  

将等腰直角三角形AOB按如图所示放置，然后绕点O逆时针旋转90°至△A′OB′的位置，点B的横坐标为2，则点A′的坐标为（   ）