Depending clinical observation and analysis, there are some main cause, that is environment disease? Nutrition? Management and psychological of pig.
据临床观察和分析，其发生原因主要有环境因素、疾病因素、营养因素、饲养管理因素及猪的心理行为因素等。
METHODS The international disease cause of death of WHOs stipulation to classify(ICD 10)coding, by the da-tum classification statistical analysis.
方法采用WHO规定的国际疾病死因分类穴ICD-10雪编码，将资料分类统计分析。
Methods: We made an analysis on disease cause, case history and symptom features of 103 cases visual fatigue.
方法：通过对103例视疲劳患者的病因、病史及症状特点进行临床分析。
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