湿地栈道的观察节点

提示词

按给定湿地游览方案表现栈道局部扩展的观察节点，栈道与水生植物边界保持，观察面不凭空深入未开放区域。

Use the supplied wetland visitor proposal to show an observation widening along a boardwalk, retaining the boardwalk and aquatic-plant boundaries without extending into areas not designated for access.