var newsassort; newsassort=" | "; newsassort+=' 流行病学 | ';newsassort+=' 病因学 | ';newsassort+=' 临床表现 | ';newsassort+=' 诊断 | ';newsassort+=' 治疗 | ';newsassort+=' 预防 | '; document.write (newsassort);