One more reason to keep your glass half full: Optimists might be less likely to have a stroke.

又有一个原因来让你保持乐观。那就是乐观的人不容易患中风。

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If they catch it early enough, they can administer the clot-busting drug tPA to keep even more brain cells from dying—but tPA is not appropriate for all types of stroke.

如果他们能够在早期发现中风征兆，那么可以通过给病人服用抗栓塞药物（TPA）以避免更多的脑细胞死亡，但这种药物不是对所有种类的中风都有效。

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If you keep working in such a temperature, you will run a risk of getting heat stroke.

如果你在这样的温度下继续工作，就有中暑的危险。

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Hull were not without their chances, and tackles from Shaun Briscoe denied Lee Radford and Sean Long on the line, while Fox and Ben Cockayne did brilliantly to keep Jordan Turner out on the stroke of the hooter.

BBC: Hull FC 4-21 Hull KR

But Steele also did brilliantly to keep out a Crouch header on the stroke of half-time and Barnsley capitalised when they equalised out of nowhere after the interval.

BBC: Liverpool 1-2 Barnsley

Speaking to BBC News online, Prof Buchan said the focus of this research was on "ways to keep brain cells alive" which could have impacts beyond stroke - such as in Alzheimer's disease and spinal cord injuries.

BBC: Brain's 'stroke shielding' cracked