A precise accounting is all but impossible because, medical authorities say, victims were buried before the cause was known, and poor patients might not have seen doctors.

• 药物官员说，进行精确的统计根不可能，因为，受害者在致死原因被了解前就已被埋葬了，还有就是家境贫困的患者未到医院就医，而不被医生记录。