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      • Surgical strategy for presacral tumors: analysis of 33 cases

        Background Presacral tumors are highly infrequent tumors located in the space known as presacral or retrorectal space.Although there have been substantial improvements in the prognosis of patients with malignant presacral tumors,the development of newer surgical strategy is likely to further improve the oncologic outcomes of malignant presacral tumors.The aim of this article was to report our experience in 33 cases,and to review the surgical strategy,pathological features and the prevention of complications from our experience.Methods A retrospective analysis was conducted on 33 cases (20 male and 13 female) with presacral tumors surgically treated in our hospital between January 1998 and April 2009.The surgical approaches included trans-abdominal in 10cases (30%),trans-sacral in 18 cases (55%) and combined abdominal-sacral in 5 cases (15%).All patients got followed up (14-123 months,mean of 45.1 months).At last,the general information,clinical symptoms,histodiagnosis,surgical types and postoperative complications of all cases in our series were assessed.Results Ages of 33 patients ranged from 18 to 71 years,with an average of 48.5 years.Pathological findings:6 epidermoid cysts,5 teratomas,3 leiomyomas,9 neurofibromas,5 neurilemmomas,1 enterogenous cyst,1 liposarcoma,1 leiomyosarcoma,1 angiosarcoma,and 1 neurofibrosarcoma.All tumors were excised with no perioperative death.A colostomy was taken in one case with angiosarcoma involving the rectum because of the intraoperative injury of the rectum.Blood loss during surgery was 400-11 000 ml (mean of 2400 ml).Four (12%) cases had local recurrence during follow-up:2 because of inadequate drainage after dermoidectomy,both of them were cured by surgical resection and drainage; recurrence occurred in a case of teratoma in 18 months after surgery,cured by a trans-sacral excision; local recurrence and lung metastasis occurred simultaneously in a case of angiosarcoma in 6 months postoperatively and the patient died one month later of respiratory failure.Conclusions The main treatment of most presacral tumors is surgical resection.Selection of surgical approach is very important for complete resection of the presacral tumors.The location,size and peculiarities of tumors,conditions of the skin and soft tissues and the patients' somatotype are all determinative factors.Multidisciplinary cooperation is also very necessary....

        2020-12-06 21:11:24瀏覽:22 presacraltumorssurgicalstrategydiagnosis

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      • The analysis of Hengkelong Supermarket Management Behavior

        With the development of local retail industry,Hengkelong Supermarket win fat profit.Yet how can it maintain its business advantage in the fierce competition with foreign business giants? This paper analyzes the management behavior of Hengkelong Supermarket,intending to give relevant policy recommendations....

        2020-11-22 17:58:37瀏覽:28 managementbehaviorlocalretaildevelopmentstrategy

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      • A Cognitive Analysis on Translation Strategy

        A cognitive interpretation of the basic translation strategy,domestication and foreignization,is elaborated in this paper.It is proposed that based on differences in linguistic presentation and cultural connotation,the application of translation strategy is determined by the style of the source text (ST) and the translator’s performance,both of which are generated from individualized style of construe,decided by a range of experiences.So great importance should be attached to experience and construe.Such an interpretation is proposed to provide a new perspective to study translation strategy and initiate a better comprehension of the ST and translation....

        2020-11-22 17:58:37瀏覽:34 cognitiveAnalysisTranslationstrategystyleconstrueexperience

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      • 中國清潔煤炭能源戰略思考

        根據中國能源資源的國情,闡述煤炭能源的高效清潔利用仍然是我國能源研究領域的重中之重。以礦物加工工程和化學工程學科為基礎,論述我國清潔煤炭能源的特點以及煤炭的加工和轉化技術,指出高效煤炭加工利用的新技術、新工藝必須納入新能源規劃的考慮范圍之內。傳統的煤加工與煤轉化理論和技術面臨著嚴峻的挑戰。煤基多聯產是符合我國國情的煤炭清潔高效利用新技術系統,是最經濟有效的方法。建設大型坑口電站是當前資源配置最優化、最經濟、最潔凈能源的戰略。二段干法選煤的灰分〈8%,硫分〈5%,該技術既可用于新建電廠也適用于老廠改造。...

        2020-11-09 23:27:06瀏覽:20 能源煤炭清潔高效利用戰略energycoalhigh-efficientandcleanutilizationstrategy

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      • 低碳經濟視角下木薯燃料乙醇產業發展對策——以廣西武鳴縣為例

        低碳經濟是有效緩解能源短缺和環境保護壓力的現實選擇,而發展非糧燃料乙醇則是我國應對能源危機及節能減排的重要途徑。通過訪談、問卷等方法,以農戶、企業、木薯辦、加油站和消費者作為研究對象,以全國木薯第一大縣——武鳴作為調研地,以木薯燃料乙醇產業發展作為切入點,提出政府(木薯辦)推動下的"公司+合作社+農戶"的合作模式和發展戰略。...

        2020-09-30 09:14:00瀏覽:33 低碳經濟木薯燃料乙醇發展戰略low-carboneconomycassavafuelethanoldevelopmentstrategy

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      • 中國天然氣工業存在的問題及對策

        Although significant progress in China's natural gas industry has been made since the adoption of the "Eighth Five-Year Plan"(from 1991 to 1995), some problems still exist in the aspects of gas resources, exploitation, utilization and macromanagement, and hinder a further development of the natural gas industry. A series of strategies for solving the problems was put forward, including accurate orientation of the natural gas industry, strengthening the construction of gas transmission and distribution networks, comprehensive exploitation policies for "integration of up-and-downstream",government-supported gas-preferential policies, construction of the gas market frameworks and devoting strong effort to the new market development....

        2020-06-12 14:54:18瀏覽:1387 ChinanaturalgasindustryProblemdevelopmentstrategy

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      • 中國天然氣工業存在的問題及對策

        Although significant progress in China's natural gas industry has been made since the adoption of the "Eighth Five-Year Plan"(from 1991 to 1995), some problems still exist in the aspects of gas resources, exploitation, utilization and macromanagement, and hinder a further development of the natural gas industry. A series of strategies for solving the problems was put forward, including accurate orientation of the natural gas industry, strengthening the construction of gas transmission and distribution networks, comprehensive exploitation policies for "integration of up-and-downstream",government-supported gas-preferential policies, construction of the gas market frameworks and devoting strong effort to the new market development....

        2020-03-24 09:01:54瀏覽:1394 ChinanaturalgasindustryProblemdevelopmentstrategy

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      • 城市污水資源化與水資源循環利用研究

        分析了我國水資源匱乏的現狀,提出了城市污水資源化的策略理念.為了實現水資源有效循環利用,提出了較為具體的實現污水資源化的政策路徑與方法....

        2020-03-24 08:43:07瀏覽:1393 污水資源化水資源循環利用策略groupincidentswaterresourcesrecyclingstrategy

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