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资料1:小明发烧咳嗽,血液化验单的检查结果如表1.经进一步检查,医生判断小明患上急性肺炎.输液室里,护士将输液针头扎入小明手背的“青筋”,抗生素“美洛西林钠”缓缓滴入小明的血管中.

资料 2:至今,人类发现和合成的抗生素挽救了很多人的生命.但是抗生素的使用也具有危害,图是抗生素“头孢克肟”的药品说明书的主要信息.另外,不正确地使用抗生素,会导致细菌产生耐药性.随着细菌耐药性的增加,对同一种病症,抗生素的使用剂量将越来越大,但效果越来越弱,而新型抗生素的研发却十分困难.未来,面对细菌的感染,人类也许将处于的没有抗生素可用的困境.

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    Schools across the world are trying to come up with solutions to keep students active. Some are replacing traditional classroom chairs with exercise balls or standing desks. At Ward Elementary School in Winston, North Carolina students have adopted a new program that requires riding fixed bikes while reading.

    'Read and Ride' is the creation of school counselor Scott Ertl, who came up with the idea while he was exercising and reading at the gym. Believing it would be a fun way to convince students to become more active, he placed one in the corner of his classroom and encouraged them to use it during independent reading classes.

    It was so popular that Ertl decided to add more bikes and offer the Read and Ride program to the entire school. Today Ward Elementary has a dedicated exercise room filled with bikes that can be used by students while completing their daily reading assignments.

    Besides making reading more fun, the program also helps students exercise at a comfortable pace without the pressure that comes with regular sports-related activities. It is also a perfect way to release energy during days when the weather is not helpful to outdoor activities.

    Most importantly, however, are the program's academic benefits. A year after Read and Ride was introduced at Ward Elementary School, students actively involved in the program demonstrated an astonishing 83% reading proficiency. Those that had not taken advantage of the exercise bikes tested at a much lower, 41%.

    Though the substantial improvement in academic achievement cannot all be attributed to programs like Read and Ride, experts believe they are a significant contributor. That's because studies have shown that physical activity stimulates(刺激) brain cells and helps prepare it for learning. As word of the difference made by this easy to execute exercise program spreads, don't be surprised to find schools across the country adopt “Read and Ride” for their students.