患者，男，40岁。胸痛、反酸、烧心、暧气2个月，胃镜检査食管黏膜未见明显异常，最有助于明确诊断的检査是(    )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26310' and id < 2201820 and id<>'2201820' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26310' and id > 2201820 and id<>'2201820' order by id asc limit 5