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 A person exhibiting excessive worry about one’s health 

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Medical doctors who specialise in diagnosing diseases using X-rays, CT scans and ultrasound

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A person who shows people their seats

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 Giving the worrying impression that something bad is going to happen

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Someone who is reserved and shy.

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Easily provoked

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Adjust or make right; correct, amend

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 An outlook that is influenced by people from all over the world