分析实质性器官的声像图时应注意什么？
参考答案：
①要确定属于弥漫性病变，还是占位性病变；
②要确定病变的部位；
③要确定病变的性质。
根据括号内的汉语提示，完成句子。
1. We have ______ (成功) in launching manned spaceships.
2. The Party is considering ______ (提供) the farmers with more care.
3. He is a little weak in _______ (发音).
4. There is no _______ (发现) in the research for the cause of the earthquake.
5. The students wrote best wishes on the blackboard with colored ______ (粉笔)
6. The scientist is a ______ (有创造力的) man.
病人男性，60岁，主诉尿频、夜尿增多5年，近2年排尿费力，尿线细；体检：直肠指诊前列腺4cm×3cm，未及硬结，肛门括约肌张力正常，球海绵体肌反射存在；排尿后下腹部叩诊浊音区于脐下2横指；血清PSA 1.8 ng/ml。其最合理的初步诊断是
A．前列腺癌B．前列腺增生伴慢性尿潴留C． * * 狭窄D．急性尿潴留E．前列腺癌伴急性尿潴留
