预防幼儿视力问题的最佳方法是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27769' and id < 2283294 and id<>'2283294' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27769' and id > 2283294 and id<>'2283294' order by id asc limit 5