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英語 高校

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In addition, as a type of mental stimulant, caffeine
increases alertness, memory, and reaction speed.
5.
(6
Because it fights tiredness it improves performance
on tasks like driving, flying, and solving simple math
Ot
5 problems. It is true that caffeine can increase blood
pressure, but the effect is usually temporary and
therefore not likely to cause heart trouble, especially
(thus)
if caffeine is consumed in sensible amounts.
8 Caffeine's effects are real, but most often mild.
10 This is why many of the most popular drinks on
earth contain caffeine.