教学视频中可视化看板的几个细节问题反馈（关于配色、单位和性...

关于教学视频里看板设计部分，我有几个实际实施中经常遇到的困惑，想借此机会反馈一下：

颜色映射的一致性
视频中“不同区域销售分析”的柱状图用了渐变红，但饼图用了分类蓝。同一个看板里，同个维度的颜色不统一，会让用户产生困惑。
建议官方在课程中强调整体UI的“视觉一致性”，统一配色规范。

大数据量下看板加载性能无提示
演示视频中的看板加载非常快，但那是因为数据量小。实际上，如果看板里放的明细表超过几十万行，查询会瞬间卡死。
建议官方能出一期“大数据量看板的优化特辑”，讲一下分页加载、异步查询或者预聚合的使用场景，单纯只讲漂亮图表不符合实际实施需求。

单值图/翻牌器的单位后缀缺失
视频中“总销售额”的翻牌器没有加“万元”或者“元”的后缀，导致数字很大，用户看得很累。
建议在看板设计基础篇里，强制要求给所有单值指标加上单位后缀和千分位分隔符，这种小细节往往是客户验收时的扣分项。

希望官方越做越好！

谢谢
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