若该患者的贫血为恶性贫血，则最宜选用 的药物是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29757' and id < 2416537 and id<>'2416537' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29757' and id > 2416537 and id<>'2416537' order by id asc limit 5