经长期观察，发现海员在长期航行后血清中明显增加的成分是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='20043' and id < 1743556 and id<>'1743556' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='20043' and id > 1743556 and id<>'1743556' order by id asc limit 5