首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   28995篇
  免费   1347篇
  国内免费   808篇
耳鼻咽喉   1229篇
儿科学   587篇
妇产科学   427篇
基础医学   3512篇
口腔科学   795篇
临床医学   1712篇
内科学   1974篇
皮肤病学   175篇
神经病学   1269篇
特种医学   742篇
外科学   11096篇
综合类   3719篇
现状与发展   1篇
一般理论   1篇
预防医学   949篇
眼科学   250篇
药学   1239篇
  21篇
中国医学   219篇
肿瘤学   1233篇
  2024年   44篇
  2023年   434篇
  2022年   819篇
  2021年   1036篇
  2020年   973篇
  2019年   1028篇
  2018年   952篇
  2017年   834篇
  2016年   819篇
  2015年   930篇
  2014年   1818篇
  2013年   1582篇
  2012年   1702篇
  2011年   1876篇
  2010年   1745篇
  2009年   1713篇
  2008年   1586篇
  2007年   1675篇
  2006年   1406篇
  2005年   1292篇
  2004年   1104篇
  2003年   892篇
  2002年   747篇
  2001年   623篇
  2000年   463篇
  1999年   415篇
  1998年   334篇
  1997年   296篇
  1996年   266篇
  1995年   186篇
  1994年   169篇
  1993年   123篇
  1992年   109篇
  1991年   111篇
  1990年   100篇
  1989年   83篇
  1988年   87篇
  1987年   73篇
  1986年   69篇
  1985年   96篇
  1984年   80篇
  1983年   62篇
  1982年   54篇
  1981年   46篇
  1980年   47篇
  1979年   52篇
  1978年   49篇
  1976年   31篇
  1975年   36篇
  1974年   26篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
指背腱膜的解剖学研究   总被引:1,自引:1,他引:0  
目的 探讨指背腱膜的构成特点及临床意义。方法 在30只成人尸体手标本上,通过模拟手术,对指背腱膜的构成特点进行了应用解剖学观测。结果 指背腱膜的构成复杂,其中的外侧腱束、外侧束、外侧腱和中央束在手指畸形的发生中有着特殊的临床意义。外侧腱束主要形成伸近节指间关节的功能解剖机制;其与外侧束形成的密切纤维联系而具有协同外侧腱的功能;该腱束与屈肌腱鞘有联系又使其具有平衡屈肌和伸肌肌力的作用。中央束在指背腱膜的整体协调、畸形的发生及矫正过程中起着重要的功能。结论 通过对指背腱膜的解剖研究,可以解释因指屈、伸肌腱平衡被破坏后所形成的畸形。  相似文献   
92.
Objective To study the feasibility, superiority and experience of minimally invasive laparoscopic-assisted surgery of the thyroid using ultrosonic scalpel. Methods In a period from January, 2006-August, 2008, 56 patients of the department of general surgery, the hospital of Heilongjiang Province were diagnosed as thyroid node. The size of the nodes ranged from 5.0 cm×4.2 cm to 3.5 cm×2.0 cm in uhrosonography. An incision of about 1.5-2.0 cm was made 1.0 cm above the suprasternal notch and the operation was performed with ultrosonic scalpel assisted with laparoscope. Partial thyroideetomy of lateral thyroid was performed in 20 cases, subtotal thyroidectomy in 25 cases, subtotal thyroidectomy of unilateral thyroid and partial thyroidectomy of contralateral thyroid respectively in 1 case, partial thyroidectomy of bilateral thyroid in 10 cases. Results All 56 cases have undergone minimally invasive laparoscopic-assisted surgery successfully in 50-146 min and no complications occurred. Fifty five cases were confirmed to be benign lesion pathologically. Conclusion Laparoscopic-assisted surgery of the thyroid is an effective with a good cosmetic result.  相似文献   
93.
目的:探讨上颌骨LeFortI型截骨进路切除累及翼腭凹、颞下凹巨大鼻咽纤维血管肿瘤的可行性。方法:采用矫正上颌骨先天或后天畸形的LeFortI型截骨术式进路,切除位于鼻咽部、筛窦等深在部位的纤维血管瘤。结果:该进路术野显露充分,取得了理想的治疗效果。结论:上颌骨LeFortI型截骨进路是切除鼻咽、颅底部纤维血管瘤的理想进路。  相似文献   
94.
目的:探讨海绵窦上段动眼神经的应用解剖并讨论其临床意义。方法:经血管灌注后观测10例尸颅的海绵窦上段动眼神经及其毗邻与血供。结果:海绵窦上段动眼神经与海绵窦上段背侧紧邻海马钩回,内侧与视交叉、后交通动脉毗邻,外上与脉络膜前动脉相邻,腹侧紧贴鞍背突。海绵窦上段动眼神经80%未见神经外营养血管,可见20%后交通动脉发出1~2根分支进入神经。结论:海绵窦上段动眼神经毗邻结构复杂,滋养血管细小;在海绵窦上缘手术时,应特别注意辨认和保护动眼神经。  相似文献   
95.
BACKGROUND: Randomized studies demonstrate that laparoscopic appendectomy yields better results compared with open techniques. We sought to identify factors that determine an extended hospital stay among patients undergoing laparoscopic appendectomy. METHODS: This was a prospective study including 669 patients undergoing laparoscopic appendectomy. We analyzed variables that can predict the length of hospital stay. RESULTS: Of 669 patients undergoing laparoscopic appendectomy, 141 stayed in the hospital for > or = 5 days (Group 1), and 97 stayed in the hospital for < or = 1 day after surgery (Group 2). The univariate analysis demonstrated that fever (P<0.0001), nausea and vomiting (P=0.060), leukocytosis (P<0.0001), gangrened or perforated intraoperative appearance of the appendix (P<0.0001), and appendix position behind the ileocecal junction (P<0.001) were related to a longer hospital stay. The multivariate analysis through logistical regression showed that the factors independently and significantly associated with an extended hospital stay were presurgical fever, appendix position behind the ileocecal junction, and intraoperative gangrened or perforated appearance of the appendix. CONCLUSION: Fever, appearance, and position of the appendix are factors related to an extended hospital stay.  相似文献   
96.
The intercostal hernia of the lung is a very rare extraordinary disease that requires operation because of the complaints and potential complications. The authors review cases of their operations and analyze the subsequence and treatment. Three patients have been treated for intercostal lung hernia in our treatment. The causes of this disease were a previous thoracotomy in one case and fits of coughing in the other two cases. The diagnosis was set up on the grounds of the specific clinical symptoms, thoracic X-ray and CT scan. The hernia was dissolved with percostal stitches and with the suture of the thoracic musculature in two cases. Plastic operation of the thoracic wall by implanting a polypropylene surgical mesh (Prolen, Ethicon, Johnson & Johnson) was performed in the case of the third patient and later in the first two patients due to recrudescence. In one case the authors were constrained to resect the dystelectasial lung in the hernial sac. The three patients had been operated five times. Relapse of hernia was detected in two patients, in whom the intercostal space had been reconstructed with percostal stitches. We did not detect any relapsing in those two patients at 33 and 66 months after the second operation with mesh implantation. The third patient who got mesh implant immediately did not relapse 12 months after the operation. Intercostal lung hernia is an indication of operation. A plastic operation of the thoracic wall combined with the implantation of a surgical mesh is recommended to close the hernial orifice, which is suitable for treating both primary and relapsed hernias. Recurrence is rare in those patients treated with this method.  相似文献   
97.
干下漏斗部室间隔缺损的外科治疗   总被引:9,自引:0,他引:9  
46例干下漏斗部室间隔缺损,占同期室缺手术治疗的23.2%(46/198)。缺损位于肺动脉瓣下34例,漏斗部12例。用带垫片褥式缝合修补21例,补片修补25例。全组无死亡。术后直接缝合组有主动脉关闭不全2例、残余分流2例,残留杂音3例。笔者认为,适时手术,选择适当的进路、应用补片修补、正确判断和处理主动脉瓣病变及对合并肺动脉狭窄者予以流出道补片加宽,是提高本病手术疗效的关键。  相似文献   
98.
颌面部爆炸伤软组织缺损早期修复的实验研究   总被引:16,自引:4,他引:12  
将犬随机分为A(即时)组、B(72h)组,采用KTY-04型雷管置于犬面颊部引爆致伤,造成软组织洞穿性缺损。A组伤后即刻清创、隐动脉皮瓣立即移植修复皮肤缺损;B组伤后即刻清创,72h后二次清创,同时切取隐动脉皮瓣,吻合血管修复皮肤缺损,颊粘膜缺损两组均行局部拉拢缝合。术后观察1~6个月,A组5例均失败;B组15例,成功12例,游离皮瓣成活率为80%。实验结果表明口腔颌面部爆炸伤软组织缺损经早期清创,72h后扩创,用吻合血管游离皮瓣修复是可行的。  相似文献   
99.
100.
本文报告了4例涉及椎体及其后部结构的全椎骨肿瘤的外科治疗,介绍了全椎骨切除术的手术方法及手术注意事项。手术采用后路附件切除,上下椎体Steffee钢板内固定,前路椎体切除自体髂骨植骨融合,初步效果满意。本手术难度大、出血多、危险性高,术中采用控制性低血压,以减少出血。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号