全文获取类型
收费全文 | 138466篇 |
免费 | 8340篇 |
国内免费 | 1655篇 |
专业分类
耳鼻咽喉 | 2092篇 |
儿科学 | 2135篇 |
妇产科学 | 2029篇 |
基础医学 | 21805篇 |
口腔科学 | 3277篇 |
临床医学 | 13143篇 |
内科学 | 24478篇 |
皮肤病学 | 4204篇 |
神经病学 | 11019篇 |
特种医学 | 7555篇 |
外国民族医学 | 2篇 |
外科学 | 18159篇 |
综合类 | 2052篇 |
现状与发展 | 5篇 |
一般理论 | 29篇 |
预防医学 | 7557篇 |
眼科学 | 3445篇 |
药学 | 12534篇 |
2篇 | |
中国医学 | 1888篇 |
肿瘤学 | 11051篇 |
出版年
2023年 | 1051篇 |
2022年 | 3075篇 |
2021年 | 4872篇 |
2020年 | 2472篇 |
2019年 | 3347篇 |
2018年 | 4104篇 |
2017年 | 3353篇 |
2016年 | 4282篇 |
2015年 | 5918篇 |
2014年 | 7043篇 |
2013年 | 8130篇 |
2012年 | 12102篇 |
2011年 | 11698篇 |
2010年 | 6742篇 |
2009年 | 5812篇 |
2008年 | 8166篇 |
2007年 | 7806篇 |
2006年 | 7020篇 |
2005年 | 6478篇 |
2004年 | 5698篇 |
2003年 | 5020篇 |
2002年 | 4281篇 |
2001年 | 3344篇 |
2000年 | 3058篇 |
1999年 | 2408篇 |
1998年 | 1049篇 |
1997年 | 787篇 |
1996年 | 585篇 |
1995年 | 516篇 |
1994年 | 436篇 |
1993年 | 384篇 |
1992年 | 826篇 |
1991年 | 778篇 |
1990年 | 696篇 |
1989年 | 627篇 |
1988年 | 508篇 |
1987年 | 506篇 |
1986年 | 364篇 |
1985年 | 410篇 |
1984年 | 288篇 |
1983年 | 207篇 |
1982年 | 142篇 |
1981年 | 187篇 |
1980年 | 141篇 |
1979年 | 235篇 |
1978年 | 173篇 |
1977年 | 133篇 |
1976年 | 142篇 |
1974年 | 146篇 |
1973年 | 130篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
Hyun Jong Choi Jong Ho Moon Yun Nah Lee Hyun Su Kim Ji Su Ha Tae Hoon Lee Sang‐Woo Cha Young Deok Cho Sang‐Heum Park 《Digestive endoscopy》2015,27(7):772-775
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS. 相似文献
4.
5.
6.
目的探讨腹腔镜经腹腹膜前疝修补术(TAPP)放置腹膜前引流对术后血肿及血清肿的影响。
方法选取2016年6月至2018年5月,江苏省苏州市中西医结合医院收治的单侧腹股沟疝患者90例,随机分为试验组和对照组,2组患者均行TAPP手术。试验组放置腹膜前引流管,对照组不放置引流管。收集2组患者的一般资料、手术相关资料及随访资料进行统计学分析,对比2组患者术后血肿及血清肿发生率差异。
结果全部患者均完成手术及随访。2组患者的一般资料、疝位置、疝分型、手术时间、住院花费、术后住院时间差异无统计学意义(P>0.05)。2组患者的术后发热发生率、急性疼痛发生率差异无统计学意义(P>0.05)。试验组术后血肿发生率明显低于对照组(P<0.05),试验组患者术后1和3个月血清肿发生率明显低于对照组,差异有统计学意义(P<0.05)。2组患者1年随访均观察到1例复发的病例,差异无统计学意义(P>0.05);随访期内2组患者均未出现感染的病例。
结论TAPP中,放置腹膜前引流管能够有效降低患者术后血肿和血清肿的发生率,同时并不增加感染和复发风险。 相似文献
7.
Sundaram Kavin Piuzzi Nicolas S. Patterson Brendan M. Stearns Kim L. Krebs Viktor E. Mont Michael A. 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2020,30(3):447-453
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate... 相似文献
8.
9.
Hyo-Kon Kim Sung-Han Ha Gi-Jun Lee Sun-O Yu Jung-Rae Kim 《Clinics in Orthopedic Surgery》2015,7(3):414-417
Synovial chondromatosis is a rare lesion in the wrist, but some cases in the distal radioulnar joint have been reported and previous case reports emphasize joint calcifications, shown on preoperative plain radiographs. We report an extremely uncommon case of synovial chondromatosis in the pisotriquetral joint, in which radiographs and magnetic resonance imaging did not demonstrate apparent calcified bodies. In our case, for the accurate diagnosis and treatment, surgical exploration of the joint and synovectomy with removal of loose bodies was performed. 相似文献
10.
In the 6th Basic Plan for Long-Term Electricity Supply and Demand (6th BPE) for Korea, for the first time, the environmental costs of air pollution caused by oxides of sulfur (SOx), oxides of nitrogen (NOx), and particulate matters (PM) from power plants were estimated and included. However, several deficiencies in evaluating the environmental costs were found. In this study, (1) the validity of the environmental costs used in the 6th BPE was assessed, (2) a systematic approach was suggested and used to improve the environmental costs estimation, and (3) the sensitivity of the cost of generating electricity to the environmental costs by fuel type with the proposed approach was discussed. We found that the applied environmental costs used in the 6th BPE did not fully include the demographic characteristics of Korea. By applying more realistic parameter values, it was found that the newly estimated environmental cost was about 23 times higher than the cost estimated in the original 6th BPE for coal-fired power plants and about 1.5 times higher for liquefied natural gas (LNG)-fired power plants, suggesting that LNG-fired power plants are more economical if using more realistic environmental costs. Thus, it is critical to check the validity of parameter values when calculating environmental costs. 相似文献