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You could fill a store with all the energy drinks now available. They promise to make people feel more energetic and think more clearly. These products have names like Red Bull, Monster, Ripped Force, Speed Stack and 5-Hour Energy. They appeal mainly to young people and are fueled mainly by caffeine.
Chad Reissig at Johns Hopkins University in Baltimore, Maryland, is a medical researcher who studies drug dependence. He says the team he works on got interested in studying energy drinks because of the explosion in their popularity in the last few years.
He says the researchers found three major things. One: there are hundreds of brands of energy drinks in most major countries. Two: the drinks are not clearly labeled with enough information. And three: the amount of caffeine varies greatly. Some contain as little as fifty milligrams, others as much as five hundred.
By comparison, a cup of Starbucks brewed coffee contains 330 milligrams in 473 milliliters.
Some energy drinks contain a mixture of ingredients listed as an “energy blend(混合物)”. Ingredients like taurine, guarana and inositol are natural substances. But Chad Reissig says scientists do not know a lot about them and how they interact with each other and caffeine. And worse, he says, there is no listing of the amount  of each ingredient.
Some people combine energy drinks with alcohol. They think they can drink more alcohol that way and not be affected. Studies, however, suggest that they are still under the influence of the alcohol even if they do not feel that way.
Some makers of energy drinks do provide warnings. For example, a popular energy shot warns against use by people who are pregnant, nursing a baby or under the age of twelve. Energy shots are small bottles of liquid. The directions also advise people to limit caffeine products and drink only half the bottle if they want a moderate (适度的) amount of energy.
The team at Johns Hopkins University School of Medicine published a report in the journal Drug and Alcohol Dependence. They suggested better labeling with the amount of caffeine and other ingredients clearly listed on the drink. The researchers are continuing to study energy drinks. They are currently seeking young people who have had a bad experience after drinking them.

Research on energy drinks
Brands of energy drinks	Red Bull, Monster, Ripped Force, Speed Stack and 5-Hour Energy and so on.
(71)____ of energy drinks	Young people would feel more energetic and drink more clearly after drinking them.
(72)_____ for research	Why energy drinks are extremely(73)_____ with young people?
Researchers’(74) _____	•Hundreds of energy drinks in most major countries are not clearly labeled with ingredients. •The amount of caffeine is(75)_____ from one kind to another.
Problems of energy drinks	•How “energy blends” interact with each other and caffeine and the amount of each ingredient are(76)_____ to scientists. •Some people drink energy drinks together with alcohol, (77)_____ they won’t be affected.
(78)_____ of the researchers	List exact amount of caffeine and other ingredients on the bottle.
Researchers’ (79)_____ job	To find young people with a bad experience after drinking energy drinks for(80)_____ research.

科目 英语   题型 阅读理解   难度 较易

知识点： 短文理解