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   26763篇
  免费   1313篇
  国内免费   715篇
耳鼻咽喉   1127篇
儿科学   701篇
妇产科学   482篇
基础医学   876篇
口腔科学   509篇
临床医学   2435篇
内科学   2271篇
皮肤病学   195篇
神经病学   958篇
特种医学   523篇
外科学   10433篇
综合类   2988篇
预防医学   1723篇
眼科学   218篇
药学   1768篇
  31篇
中国医学   258篇
肿瘤学   1295篇
  2024年   55篇
  2023年   514篇
  2022年   900篇
  2021年   1090篇
  2020年   1042篇
  2019年   1167篇
  2018年   1094篇
  2017年   882篇
  2016年   860篇
  2015年   948篇
  2014年   1843篇
  2013年   1643篇
  2012年   1697篇
  2011年   1768篇
  2010年   1607篇
  2009年   1595篇
  2008年   1450篇
  2007年   1437篇
  2006年   1198篇
  2005年   1048篇
  2004年   880篇
  2003年   690篇
  2002年   576篇
  2001年   475篇
  2000年   342篇
  1999年   276篇
  1998年   210篇
  1997年   171篇
  1996年   189篇
  1995年   125篇
  1994年   113篇
  1993年   80篇
  1992年   55篇
  1991年   68篇
  1990年   55篇
  1989年   37篇
  1988年   35篇
  1987年   32篇
  1986年   41篇
  1985年   59篇
  1984年   66篇
  1983年   42篇
  1982年   44篇
  1981年   33篇
  1980年   37篇
  1979年   44篇
  1978年   49篇
  1976年   26篇
  1975年   33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.
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   
92.
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   
93.
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   
94.
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   
95.
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   
96.
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   
97.
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   
98.
本文报道手术治疗骨折不愈69例,根据骨折部位、关节功能、身体状况,采用了8种不同手术方法治疗,术后随访2~8年,治愈率96%。作者对骨折不愈合原因、手术方式的选择和并发症的处理进行讨论,提出了相应的预防措施。  相似文献   
99.
100.
河南省地方性高碘甲状腺肿的发现、流行特征及其干预研究@陈豪敏$河南省卫生防疫站!河南郑州450003 @底秀娟$河南省卫生防疫站!河南郑州450003 @李冬丽$河南省卫生防疫站!河南郑州450003 @柯庚寅$河南省卫生防疫站!河南郑州450003 @王传刚$河南省卫生防疫站!河南郑州450003 @崔顺岭$濮阳市卫生防疫站!河南濮阳457000 @王兰珍$濮阳市卫生防疫站!河南濮阳457000~~~~~~  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