在村子外围挖壕沟

        设拒马

        东南角那片高地

        搭一座简易瞭望箭塔

        村口和几条小路

        布陷坑和绊索”

        她从怀里掏出一卷粗糙的草纸

        上面用炭笔画着简易的工事示意图——线条简洁

        比例却异常精准

        标注着尺寸和要点

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