Linq到实体检查出生日期是否在给定的日期范围（EF6）之间

我需要从person表中筛选记录，其中Dob字段（日期）位于用户输入的多个日期范围中的任意一个 ...

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你知道处理这个问题的最佳方法是什么吗？

这是一个精心编制的查询，它在Linq到EF和Linq到对象之间跳跃

List<Tuple<DateTime,DateTime>> dateranges=.......;
IEnumerable<IQueryable<Person>> queries = from d in dateranges
                                         let startDate = d.Item1
                                         let endDate = d.Item2
              select (context.Person.Where(p => p.Birthday >= startDate && p.Birthday <= enDate));
IQueryable<Person> query = queries.Aggregate(Queryable.Concat);

    "Unable to process the type 'System.Tuple`2[[System.DateTime, mscorlib, Version=4.0.0.0, 
Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.DateTime, mscorlib, Version=4.0.0.0,
 Culture=neutral, PublicKeyToken=b77a5c561934e089], because it has no known mapping to the 
value layer."

List<Tuple<DateTime,DateTime>> dateranges=.......;
IEnumerable<IQueryable<Person>> queries = from d in dateranges
                                         let startDate = d.Item1
                                         let endDate = d.Item2
              select (context.Person.Where(p => p.Birthday >= startDate && p.Birthday <= enDate));
IQueryable<Person> query = queries.Aggregate(Queryable.Concat);

List<Tuple<DateTime,DateTime>> dateranges=.......;
List<FutureQuery<Person>> queries = from d in dateranges
                                         let startDate = d.Item1
                                         let endDate = d.Item2
              select (context.Person.Where(p => p.Birthday >= startDate && p.Birthday <= enDate).Future()).ToList();
IEnumerable<Person> query = queries.SelectMany(x =>);