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原创 最新推荐文章于 2026-06-15 12:38:51 发布 · 1.7k 阅读 点符号（.）：如果属性名是一个有效的标识符（例如，没有空格、不是以数字开头等），你可以使用点符号来访问属性。obj.propertyName。