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Springer link数据库提供的检索方式有单一次检索和运用逻辑运算符进行多次组合检索。
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Science Direct数据库在输入检索词时，区分检索词的大小写。
Eleanor Reyes was once arrested for attempting to flag down drivers on the freeway.
RAND found that dementia would take a high economic toll than heart disease and cancer by 2040.
More than 15% of Americans (about 3.8 million people) already have dementia.
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