building a /b 其实,building 和 block 都可以了。 block: a large building divided into separate units, such as apartments. 大楼:分隔成许多单元的大厦,如公寓楼 长春市西安大路727号中银大厦a座1903室room 1903, building a, zhongyin plaza, no.727 xian road, changchun 北京市西城区复兴门内金融大街33号通泰大厦b座5层100032 5/f block b,tongtai mansion no.33 finance street,xicheng d**trict beijing 20210311