Conclusion ultrasonic approach is the first choice for diagnosis low segment ureteral polyp , and it is more valuable in patients complicated with x - ray negative stone , difficult for retrograde urethrography and allergy to iodine 结论超声是输尿管下段息肉的首选筛查方法，对合并阴性结石、逆行造影困难、碘过敏者更具有价值。
Methods the ultrasonic and clinical data were analyzed retrospectively in 12 cases ( male 8 cases , female 4 cases , aged 17 to 60 years , mean age 32 . 6 years ; duration of illness 1 month to 4 years 方法对12例经输尿管镜或膀胱镜检查、病理检查证实为输尿管下段息肉（其中男性8例，女性4例，年龄17 ~ 60岁，平均年龄32 . 6岁；病程1个月4年。
The result of data analysis and studying shows that the low stand system of down - sha - 3 formation , the high stand system of mid - sha - 3 formation and the low stand system of up - sha - 3 formation are important to form subtal trap 从分析资料和研究的结果发现，沙三下段低水位体系域、沙三中段高水位体系域、沙三上段低水位体系域对于隐蔽圈闭的形成有着非常重要的贡献。
This article established the optimizing , identifying , classifying and appraising standard of the two - formation - type reservoir fluid units of the of sandstone and conglomerate reservoir of sha3 lower member and sha4 upper member , and instructs the oil exploitation 建立了沙三下段、沙四上段两种成因类型砂砾岩储层流动单元的识别参数优选、识别、分类和评价标准，并指导油田开发。
Those who are considered to have met one of the criteria under this test listed in the following paragraph will be awarded 165 points ; otherwise , no point will be awarded . applications which fail to score points under this test will be refused immediately 申请人如被视作符合下段所述此计分制所列的其中一项要求，可获取1 6 5分，不符合者则不会获得分数，而不能取得分数的申请人，其申请会即时被拒? 。
Lowstand fans and lowstand wedges formed in lowstand system tracts of sq5 and sq6 ( that is damoguaihe formation ) and deep water turbidite fans deposed in late trangrassive system tract and early highstand system tract are the major reservoir with good physical characteristics 层序5和层序6 (相当于大磨拐河组下段)低水位体系域沉积的低水位楔和低水位扇及水进晚期、高水位早期出现的深水浊积扇具有良好的储集物性，也是主要的储集层。
With the inflow reduction in the yellow river and the rapid social - economic development in ningxia , the supply - demand conflict of water resources in qyrid is becoming serious and the traditional patterns of water use in agricultural irrigation can no loner accord with the new situation of the local development 青铜峡灌区位于黄河上游下段，是我国古老的大型灌区之一。随着黄河来水量的减少和宁夏社会经济的快速发展，灌区水资源供需矛盾日益突出。
Ore area locate on , silver factory ditch - ancient tomb ditch in west branch river set lower bench , stratigraphic succession , rock assemblage are different with circumference . most is a set of intraclast congeries silica rock . in search of it , its distribution range in the silver factory ditch - ancient tomb ditch 矿区所在部位银厂沟?古墓沟一带，西岔河组下段地层中，地层层序、岩石组合特征与周边地区存在明显的差异。主要为一套内碎屑堆积的硅质岩。
The characteristics of compaction curves , the evolution of organic matter , the direction of migration and assignment , conduit system , fluid potential are studied it is concluded that the low maturity of the source of the eogene age is the main factor to control the entrapment . it controls the direction of the primary migration , confines the location of mature source rock and the special carrier rock , controls the time of expulsion and the amount of petroleum , therefore ; the effective traps should be near to oil kitchen and on the pathways of migration 认为下第三系油灶的低熟是影响其运聚成藏的关键因素，生油岩低熟决定油气初次排烃的方向指向沙三下段；生油岩低熟决定成熟生油岩分布的局限性和输导体的特殊性；生油岩低熟决定起排烃时间晚、生烃量不足，从而决定有效的圈闭应是近源的、在运移主路线上。
