老年人易发生骨折是因为缺钙。（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27190' and id < 2254588 and id<>'2254588' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27190' and id > 2254588 and id<>'2254588' order by id asc limit 5