全文获取类型
收费全文 | 36903篇 |
免费 | 2016篇 |
国内免费 | 223篇 |
专业分类
耳鼻咽喉 | 359篇 |
儿科学 | 743篇 |
妇产科学 | 809篇 |
基础医学 | 4601篇 |
口腔科学 | 1396篇 |
临床医学 | 2721篇 |
内科学 | 10440篇 |
皮肤病学 | 1052篇 |
神经病学 | 3059篇 |
特种医学 | 686篇 |
外科学 | 5185篇 |
综合类 | 203篇 |
一般理论 | 11篇 |
预防医学 | 2703篇 |
眼科学 | 764篇 |
药学 | 2115篇 |
中国医学 | 129篇 |
肿瘤学 | 2166篇 |
出版年
2024年 | 26篇 |
2023年 | 287篇 |
2022年 | 654篇 |
2021年 | 1420篇 |
2020年 | 734篇 |
2019年 | 1265篇 |
2018年 | 1474篇 |
2017年 | 876篇 |
2016年 | 862篇 |
2015年 | 1070篇 |
2014年 | 1594篇 |
2013年 | 1833篇 |
2012年 | 3066篇 |
2011年 | 3233篇 |
2010年 | 1692篇 |
2009年 | 1563篇 |
2008年 | 2434篇 |
2007年 | 2492篇 |
2006年 | 2310篇 |
2005年 | 2142篇 |
2004年 | 1919篇 |
2003年 | 1622篇 |
2002年 | 1597篇 |
2001年 | 230篇 |
2000年 | 247篇 |
1999年 | 238篇 |
1998年 | 267篇 |
1997年 | 252篇 |
1996年 | 183篇 |
1995年 | 137篇 |
1994年 | 119篇 |
1993年 | 123篇 |
1992年 | 108篇 |
1991年 | 100篇 |
1990年 | 83篇 |
1989年 | 67篇 |
1988年 | 49篇 |
1987年 | 44篇 |
1986年 | 62篇 |
1985年 | 52篇 |
1984年 | 63篇 |
1983年 | 43篇 |
1982年 | 53篇 |
1981年 | 58篇 |
1980年 | 41篇 |
1979年 | 36篇 |
1976年 | 24篇 |
1975年 | 33篇 |
1973年 | 27篇 |
1971年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Sant’ Anna B. G. Musolino N. R. C. Gadelha M. R. Marques C. Castro M. Elias P. C. L. Vilar L. Lyra R. Martins M. R. A. Quidute A. R. P. Abucham J. Nazato D. Garmes H. M. Fontana M. L. C. Boguszewski C. L. Bueno C. B. Czepielewski M. A. Portes E. S. Nunes-Nogueira V. S. Ribeiro-Oliveira A. Francisco R. P. V. Bronstein M. D. Glezer A. 《Pituitary》2020,23(2):120-128
Pituitary - To evaluate the maternal–fetal outcomes of CAB-induced pregnancies in patients with prolactinoma in a large cohort. The prevalence of tumor growth, miscarriage, preterm, low birth... 相似文献
992.
993.
994.
995.
Javier de Miguel-Díez Rodrigo Jiménez-García Valentín Hernández-Barrera Luis Puente Maestu Irene Jarana Aparicio Alicia Oliva Ramos 《COPD》2014,11(4):459-467
Aims: To analyze clustering of unhealthy lifestyle behavior and its relationship with non-adherence to recommended clinical preventive care services among Spanish COPD patients. Methods: Cross-sectional study including 2,575 COPD subjects from the 2006 Spanish National Health Survey (NHS) and 2009 European Health Survey for Spain (EHISS). Subjects were asked about the following recommended preventive practices: uptake of blood pressure (BP) measurement, lipid profile, influenza vaccination and dental examination. Lifestyle behaviors included: smoking status, physical activity, alcohol consumption and obesity. Logistic regression models were built to assess the association between clustering of unhealthy lifestyle and the uptake of preventive activities. Results: Blood pressure measurement in the previous 6 months and a blood lipid test in the last year had not been taken by 11.74% and 23.26% of the subjects, respectively, in 2006 NHS and by 11.16% and 16.33% of the subjects, respectively, in EHISS 2009. Then, 36.36% percent had not been vaccinated and 70.61% had not received dental examination in 2006 NHS and these percentages decreased to 27.33% and 66.22%, respectively, in 2009 EHISS. A higher number of unhealthy lifestyle behaviors increased the probability of not being vaccinated and not having a dental examination. Clustering of unhealthy lifestyle behaviors is linearly associated with a greater number of preventive measures unfulfilled. Conclusions: Compliance with healthy lifestyles and adherence to recommended clinical preventive services is under desirable levels among Spanish COPD patients. Patients with lifestyles considered as “worse” are those who also have lower uptake of recommended preventive activities. 相似文献
996.
Francisco Leonardo Galastri Guilherme Moratti Gilberto Breno Boueri Affonso Leonardo Guedes Moreira Valle Priscila Mina Falsarella Adriano Mendes Caixeta Camila Antunes Lima Marcela Juliano Silva Lucas Lembran a Pinheiro Conrado Dias Pacheco Annicchino Baptistella M rcio Dias de Almeida Rodrigo Gobbo Garcia Nelson Wolosker Felipe Nasser 《World journal of hepatology》2020,12(7):399-405
BACKGROUND Percutaneous transluminal angioplasty and stenting represent an effective treatment for hepatic artery stenosis after liver transplantation. In the first year after stenting, approximately 22% of patients experience in-stent restenosis, increasing the risk of artery thrombosis and related complications, and 50% experience liver failure. Although angiography is an important tool for diagnosis and the planning of therapeutic interventions, it may raise doubts, especially in small-diameter arteries, and it provides low resolution rates compared with newer intravascular imaging methods, such as optical coherence tomography(OCT).CASE SUMMARY A 64-year-old male developed hepatic artery stenosis one year after orthotropic liver transplantation and was successfully treated with percutaneous transluminal angioplasty with stenting. Five months later, the Doppler ultrasound results indicated restenosis. Visceral arteriography confirmed hepatic artery tortuosity but was doubtful for significant in-stent restenosis(ISR) and intrahepatic flow reduction. To confirm ISR, identify the etiology and guide treatment, OCT was performed. OCT showed severe stenosis due to four mechanisms: Focal and partial stent fracture, late stent malapposition, in-stent neointimal hyperplasia, and neoatherosclerosis.CONCLUSION Intravascular diagnostic methods can be useful in evaluating cases in which initial angiography results are not sufficient to provide a proper diagnosis of significant stenosis, especially with regard to ISR. A wide range of diagnoses are provided by OCT, resulting in different treatment options. Interventional radiologists should consider intravascular diagnostic methods as additional tools for evaluating patients when visceral angiography results are unclear. 相似文献
997.
Jos Pedro Martinho Sara Frana Siri Paulo Anabela Baptista Paula Ana Sofia Coelho Ana Margarida Abrantes Francisco Caramelo Eunice Carrilho Carlos Miguel Marto Maria Filomena Botelho Henrique Giro Manuel Marques-Ferreira 《Materials》2020,13(23)
(1) Aim: This study aims to analyze the in vitro infiltration of a silicate root canal sealer into dentinal tubules after using different endodontic irrigating solutions. (2) Methods: Twenty-nine teeth with single roots were separated into three groups according to the final irrigation protocol: G1 n = 10) = 17% EDTA (ethylenediaminetetraacetic acid) + 3.0% sodium hypochlorite (NaOCl), G2 (n = 10) = 17% EDTA + 2.0% chlorhexidine and G3 (Control group, n = 9) = 17% EDTA + saline solution. Root canals were filled using cold lateral compaction technique with MTA Fillapex sealer and gutta-percha. The sealer was labeled with rhodamine B. The teeth were segmented at the middle and third apical sections, which were visualized using 10× confocal laser microscopy to determine the sealer penetration percentage. (3) Results: In the apical section, no statistically significant differences were found between the groups regarding sealer penetration. In the middle section, Group 1 obtained the highest percentage, and Group 2 the lowest (p = 0.004). Group 1 also presented statistically significant differences in the Control Group (p = 0.031) and had close sealer penetration values. Meanwhile, the Control Group (p = 0.023) and Group 2 (p = 0.029) revealed a significant decrease of sealer penetration between the apical and middle sections. (4) Conclusion: The obtained results support that final irrigation with NaOCl promoted similar sealer penetration in the apical and middle sections. On the other hand, a significant decrease in the sealer penetration of the middle section was observed for the chlorhexidine and saline groups. Compared to other irrigant solutions, NaOCl promotes more uniform sealer penetration, which can correlate with better sealing and, consequently, higher endodontic treatment success. 相似文献
998.
999.
Marc Blasi Javier de la Fuente Carlo Martinoli Juan Blasi Albert Pérez-Bellmunt Tomás Domingo Maribel Miguel-Pérez 《Surgical and radiologic anatomy : SRA》2014,36(1):17-24
Purpose
The aim of this study is to correlate the ultrasound (US) appearance of the persistent double or bifid distal tendon of the biceps brachii muscle with anatomical and histological data. This will provide a new model to study the pathological distal biceps brachii tendon (DBBT).Methods
The DBBT of 20 cadaveric elbows were examined with linear array broadband US transducers (frequency band 14–6 MHz) using an anterior approach. Trypan blue dye was injected underneath the paratenon under US guidance in 16 specimens. After they were dissected, five of them were processed to obtain histological slices stained with hematoxylin–eosin and antiserum to protein S100.Results
At US, the DBBT is a tendon in which the fascicles are organized in two different hyperechoic components separated by a hyperechoic septum related to the endotenon. The endotenon is lax, flexible, and makes folding and gliding of the two portions feasible. The DBBT is surrounded by a hyperechoic paratenon adjacent to the tendon surface, which is only differentiable by US when dye is interposed between such structures.Conclusions
The connective septum of endotenon located between the two main components of the DBBT is responsible for the US image of two separate tendons and functionally enables it to work as two separate entities, thus allowing respective folding and gliding. The paratenon surrounding the lacertus fibrosus and the DBBT plays an important stabilization role, enabling them to change shape and arrangement during joint motion. It is also an important conduit for nerves and blood vessels. 相似文献1000.
José Aderval Aragão Maria Luisa Silveira Souto Carla Rocha São Mateus Liciane dos Santos Menezes Francisco Prado Reis 《Surgical and radiologic anatomy : SRA》2014,36(9):889-894