帮我讲解一下---七、下面是杨栋去新华书店的行走路线图。(10 分) [Diagram Description] Type: Route map diagram. Elements: - Points: 杨栋家 (Yang Dong's Home) at the start, 加油站 (Gas Station) as an intermediate point, 新华书店 (Xinhua Bookstore) at the end. Several unnamed turning points along the path. - Lines: A path depicted as a series of connected straight line segments. Vertical dashed lines extend downwards from 加油站 and another point. Horizontal lines are present along the path and for angle references. - Direction Indicator: An arrow pointing upwards labeled "北" (North). - Angles: Angles 45°, 45°, 60°, 60° are marked between path segments and vertical or horizontal reference lines. Near 加油站, two segments form angles of 45° with the vertical dashed line. At a later turning point, two segments form angles of 60° with the horizontal line. - Scale: A horizontal segment labeled "100米". [Questions] 1. 杨栋从家向( )行( )米到达( ),然后再向( )偏( )( )方向行( )米,再向( )行( )米,接着向( )偏( )( )方向行( )米,最后向( )行( )米到达新华书店。(7分) 2.描述杨栋从新华书店回家的行走路线。(3分)