根据作者的观点，卢浮宫的场景展现了什么？
What does the scene at the Louvre demonstrate according to the author?
根据作者的说法，对于一个在观察、分析上受过训练的人来说，“欺骗”是不可能的事。
Deceit, according to him, was an impossibility in the case of one trained to observation and analysis.
根据作者的说法，100美元的账单要支付多少小费？
What can be the tip for a $100 bill according to the writer?
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