Clinical process divides typical armour hepatitis a phase: is preclinical, prodrome period, is icteric period, convalescence.(典型的甲型肝炎臨床過程分四個階段：潛伏期，前驅癥狀期，黃疸期，恢復期。)

The prodrome of this paper includes main topics, research purpose, researching range and current situation about the relevant research in China and abroad, and the main methods the paper adopted.(在論文的序論中，介紹了論文的主題和研究目的，論文的研究范圍，國內外相關領域的研究現狀，以及論文研究采用的主要研究方式。)

The prodrome focuses on the purpose, significance, the former study and the study methods.(緒論主要對研究目的和意義、先行研究及研究方法進行了闡述。)