观测肺血管显微和超微结构的变化；
Pulmonary vascular micro and ultra structures were examined.
主要观察指标：神经垂体的显微和超微结构。
MAIN OUTCOME MEASURES: The microstructure and ultrastructure of the neurohypophysis.
运用光镜、电镜技术，观察了肉鸡腹水症自然发病鸡心、肝、肺的显微和超微结构。
The microstructure and ultrastructure of heart, lung and liver of the broiler ascites syndrome were observed.
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