In many ways, I look like the “typical” American girl. I am an average size, have blonde hair, blue eyes, and a smile when I’m nervous.

理由2：从各方面来看，我都是个”典型“的美国姑娘——我不高也不矮，金发碧眼，一紧张就爱笑。

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Researchers found women who said their natural hair colour was blonde had an average IQ score within 3 points of brunettes and those with red or black hair.

研究人员发现，自称天然发色为金色的女子与发色为棕色、红色或黑色的女性相比，智商要高出3个百分点。

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On average, their prediction accuracy was 69.5% for blonde hair, 78.5% for brown, 80% for red and 87.5% for black hair colour.

BBC: Forensic test can predict hair and eye colour from DNA