对老年脂肪肝患者胆囊壁声像图特点的探讨

国内曾有报道胆囊壁的厚度在胆囊炎性病变诊断中的价值。但有关老年脂肪肝患者部分胆囊壁增厚的机制，目前尚未明了。这方面的报道见知较少。笔者经回顾性调查，证实了Ｂ超对老年脂肪肝的诊断价值，并对老年脂肪肝患者胆囊壁声像图特点进行了动态观察。１临床资料病例选择...     

超声对急性坏疽性胆囊炎的早期诊断(附20例病例分析)

目的 :探讨急性坏疽性胆囊炎的早期超声图像特点及其对临床诊断、治疗的意义。方法 :回顾2 0例经手术病理证实的急性坏疽性胆囊炎早期超声图像特点及临床表现并进行分析研究。结果 :急性坏疽性胆囊炎的早期超声图像特点为 :胆囊极度肿大 ,宽径比长径增大更明显 ,胆囊张力极高 ;胆囊壁增厚、粗糙 ,可发生局限性增厚 ,胆囊与肝之间有条索状的细的液性暗区 ,胆囊内有稠厚的胆汁或脓汁 ,多数伴有胆囊结石、慢性胆囊炎。结论 :超声检查对急性坏疽性胆囊炎早期诊断有重要的价值 ,可对术前急性胆囊炎程度评估提供重要参考     

胆囊肉芽肿并结石2例

某患者1:女,61岁.2002年2月16日以"慢性胆囊炎并结石"入院.查体:全身皮肤巩膜无黄染,腹平坦胆囊区有压痛无反跳痛,胆囊未扪及,肝脾未扪及Murphy＇s(+),未触及包块,血常规及肝功大致正常.B超报告:①胆囊炎并胆囊结石;②胆管炎.于2月19日行胆囊切除术,术中见:胆囊与周围粘连致密,分离粘连,胆囊大小8cm×4cm,张力高,壁纤维增厚,内有白色脓汁和2.5cm×2cm结石2枚.逆行切除胆囊.诊断为化脓性胆囊炎并结石.     

急性阑尾炎的超声诊断与分析

探讨应用彩超诊断急性阑尾炎的各型声像图特征,进一步提高超声诊断率。对128例疑似急性阑尾炎的患者采用低、高频探头联合使用进行超声检查并与手术病理进行分析。急性单纯性阑尾炎诊断率低,急性化脓性阑尾炎、坏疽性阑尾炎和阑尾周围脓肿诊断率较高,声像图特征明显。急性阑尾炎具有典型的声像图特征,只要超声仪器分辨率高,检查手法得当,结合临床症状、体征以及实验室检查资料使临床上绝大多数急性阑尾炎得以明确诊断,并为外科手术提供科学依据。同时超声简便、快捷、无创伤等优点,为临床提供有利的客观诊断依据,是诊断急性阑尾炎的首选方法。     

重症急性胆管炎诊治中有关问题的探讨

急性化脓性胆管炎（ＡＳＣ）和急性阻塞性化脓性胆管炎（ＡＯＳＣ）是外科常见的重症急腹症，病势凶险，死亡率高（国内报导４５～４３．５％，本病主要临床表现为起病急骤，且有ｃｈａｒｃｏｔ′ｓ三联症和Ｒａｙｎａｕｌｄｓ五联症，我院自１９８７年～１９９７年共收...     

桥本氏甲状腺炎的超声诊断体会

探讨彩色多普勒超声显像技术对桥本氏甲状腺炎的临床诊断价值.回顾分析45例经病理组织学确诊的桥本氏甲状腺炎患者,以了解甲状腺声像图及血流显示特征.桥本氏甲状腺炎超声表现为腺体弥漫性肿大,回声不均匀呈网格状,甲状腺血流增多.甲状腺峡部增厚较为明显(平均＞1.1cm).桥本氏甲状腺炎声像图改变特征性明显,超声显像技术是该病的一种很好的诊断方法.     

应用超声检查急腹症的体会

目的：探讨超声检查急腹症的价值．方法：根据本文126例急诊患者的疾病种类，对其超声声像图进行分析．结果：输尿管结石诊断率为88．3％，肠梗阻的诊断率为90％，急性胰腺炎的诊断率为87％，急性胆囊炎的符合率为96．7％．结论：B超检查能为临床正确选择治疗方案提供重要信息，且患者易于接受．     

重症急性胆管炎诊治中有关问题的探讨(附36例报告)

急性化脓性胆管炎(ASC)和急性阻塞性化脓性胆管炎(AOSC)是外科常见的重症急腹症,病势凶险,死亡率高(国内报导45～43.5%,本病主要临床表现为起病急骤,且有charcot's三联症和Ray-naulds五联症,我院自1987年～1997年共收治36例,对有关资料进行初步临床分析,就诊断、治疗、手术选择等有关问题进行分析,提出看法,供同仁参考.     

超声诊断处女膜闭锁、阴道积血11例

讨论超声对处女膜闭锁的诊断价值。分析11例处女膜闭锁的声像图特征。8例患者年龄偏大,腹痛发作次数相对较多,声像图显示膀胱后方可探及较大的椭圆形无回声区,同时宫腔内还可探及不规则无回声区,双侧输卵管可见轻度无回声分离。3例为单纯阴道内积血,患者年龄相对偏小,腹痛发作次数较少,声像图显示于膀胱后方可探及无回声区,形态规则,轮廓清,上段与子宫相连,双侧输卵管未见异常。超声能够对处女膜闭锁造成的积血部位、程度、范围做出相对准确的估计,是影像学诊断处女膜闭锁的首选方法。     

彩色高频超声显像对急性阑尾炎的诊断价值

目的 探讨彩色高频超声显像对急性阑尾炎的诊断价值。方法 回顾性分析我院378例经手术和病理证实的急性阑尾炎彩色高频超声资料。结果 急性阑尾炎378例中,超声诊断368例,准确率97．8％,10例误漏诊。根据声像图表现可分为：急性单纯性阑尾炎（140例）,急性化脓性阑尾炎（178例）,坏疽性阑尾炎（38例）,阑尾周围脓肿（12例）。结论 彩色高频超声显像对临床疑诊急性阑尾炎患者有明确诊断及鉴别诊断价值。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.