全文获取类型
收费全文 | 8920篇 |
免费 | 614篇 |
国内免费 | 46篇 |
专业分类
耳鼻咽喉 | 84篇 |
儿科学 | 293篇 |
妇产科学 | 216篇 |
基础医学 | 1039篇 |
口腔科学 | 266篇 |
临床医学 | 712篇 |
内科学 | 2040篇 |
皮肤病学 | 182篇 |
神经病学 | 559篇 |
特种医学 | 224篇 |
外国民族医学 | 8篇 |
外科学 | 1437篇 |
综合类 | 295篇 |
一般理论 | 3篇 |
预防医学 | 655篇 |
眼科学 | 173篇 |
药学 | 767篇 |
中国医学 | 96篇 |
肿瘤学 | 531篇 |
出版年
2023年 | 118篇 |
2022年 | 255篇 |
2021年 | 443篇 |
2020年 | 238篇 |
2019年 | 302篇 |
2018年 | 326篇 |
2017年 | 235篇 |
2016年 | 291篇 |
2015年 | 318篇 |
2014年 | 403篇 |
2013年 | 478篇 |
2012年 | 679篇 |
2011年 | 753篇 |
2010年 | 419篇 |
2009年 | 345篇 |
2008年 | 492篇 |
2007年 | 431篇 |
2006年 | 451篇 |
2005年 | 460篇 |
2004年 | 369篇 |
2003年 | 318篇 |
2002年 | 295篇 |
2001年 | 94篇 |
2000年 | 90篇 |
1999年 | 108篇 |
1998年 | 53篇 |
1997年 | 46篇 |
1996年 | 35篇 |
1995年 | 51篇 |
1994年 | 38篇 |
1993年 | 41篇 |
1992年 | 47篇 |
1991年 | 24篇 |
1990年 | 40篇 |
1989年 | 42篇 |
1988年 | 33篇 |
1987年 | 39篇 |
1986年 | 35篇 |
1985年 | 25篇 |
1984年 | 20篇 |
1983年 | 26篇 |
1982年 | 28篇 |
1981年 | 22篇 |
1980年 | 15篇 |
1979年 | 17篇 |
1978年 | 24篇 |
1976年 | 14篇 |
1973年 | 14篇 |
1972年 | 15篇 |
1969年 | 15篇 |
排序方式: 共有9580条查询结果,搜索用时 15 毫秒
71.
Ariff Azfarahim Ibrahim Mohd Ammar Ihsan Ahmad Zamzuri Rosnah Ismail Ahmad Husni Ariffin Aniza Ismail Muhamad Hazizi Muhamad Hasani Mohd Rizal Abdul Manaf 《Medicine》2022,101(30)
The Teleprimary Care—Oral Health Clinical Information System (TPC-OHCIS) is an updated electronic medical record (EMR) that has been applied in Malaysian primary healthcare. Recognizing the level of patient satisfaction following EMR implementation is crucial for assessing the performance of health care services. Hence, the main objective of this study was to compare the level of patient satisfaction between EMR-based clinics and paper-based clinics.The study was a quasi-experimental design that used a control group and was conducted among patients in 14 public primary healthcare facilities in the Seremban district of Malaysia from May 10, to June 30, 2021. Patient satisfaction was assessed using the validated Short-Form Patient Satisfaction Questionnaire, which consisted of 7 subscales. All data were analyzed using the IBM Statistical Package for Social Sciences version 21.A total of 321 patients consented to participate in this study, and 48.9% of them were from EMR clinics. The mean score for the communication subscale was the highest at 4.08 and 3.96 at EMR-adopted clinics and paper-based record clinics. There were significant differences in general satisfaction and communication subscales, with higher patient satisfaction found in clinics using EMR.With the utilization of EMR, patient satisfaction and communication in delivering healthcare services have improved. 相似文献
72.
Currently, the energy crisis is a hot topic for researchers because we are facing serious problems due to overpopulation and natural energy sources are vanishing day-by-day. To overcome the energy crisis, biofuel production from non-edible plant seeds is the best solution for the present era. In the present study, we select the non-edible seeds of Acacia farnesiana for biofuel production from different areas of Pakistan with better oil production results. Different kinds of analytical method, like the American Standard for Testing and Materials and techniques like Fourier transform infra-red spectroscopy, nuclear magnetic resonance spectroscopy, gas chromatography, and inductively coupled plasma optical emission spectrometry, were used to evaluate the chemical compositions. The maximum oil extraction rate (23%) was produced by petroleum ether. Potassium hydroxide exhibited the best conversion result of 96% fatty acid methyl ester. The transesterification method was used for the preparation of fatty acid methyl ester (96%) using potassium hydroxide and methanol. The viscosity and density of Acacia farnesiana seed oil biodiesel was comparable to American Standard for Testing Material biodiesel standards. By using gas chromatography-mass spectrometry, five fatty acids were detected comprising palmitic acid (6.85%), stearic acid (2.36%), oleic acid (12.13%), linoleic acid (46.85%), and α-linolenic acid (1.23%). This study concludes that Acacia farnesiana seed oil biodiesel could be an intriguing raw material for yielding Acacia farnesiana seed oil methyl ester as an alternative fuel source.Currently, the energy crisis is a hot topic for researchers because we are facing serious problems due to overpopulation and natural energy sources are vanishing day-by-day. 相似文献
73.
Kota Sawa Kazu Amimoto Abdul Chalik Meidian Keisuke Ishigami Takuya Miyamoto Chika Setoyama Rikuya Suzuki Miko Tamura Mitsusuke Miyagami 《Journal of Physical Therapy Science》2022,34(8):540
[Purpose] This study aimed to determine the effect of delayed visual feedback on the center of pressure and sitting balance in patients with stroke. [Participants and Methods] This was a single-blinded, randomized crossover trial. The duration of each intervention in real-time visual feedback and delayed visual feedback conditions while sitting on the platform was five days. We measured the center of pressure, function in sitting test, and functional independence measure for physiotherapy assessment. [Results] Twenty patients with stroke were included in this study. The delayed visual feedback condition improved the center of pressure for lateral distance, function in sitting test, and functional independence measure. The lateral center of pressure deviation increased significantly after 500 ms of intervention. The function in sitting test evaluated the interaction between pre- and post-training, and these conditions revealed that timing and condition factors contributed to the improvement. Sitting balance training affected the functional independence measure. [Conclusion] Sensory-motor and cognitive learning was facilitated through balance training with delayed visual feedback, and the internal model was updated with the efference copy of error correction. Sensory-motor feedback to visual stimulation can improve postural control, balance, and activities of daily living. 相似文献
74.
75.
Nicolas von Landenberg Atiqullah Aziz Friedrich C. von Rundstedt Jakub Dobruch Luis A. Kluth Andrea Necchi Aidan Noon Michael Rink Kees Hendricksen Karel P.J. Decaestecker Roland Seiler Cédric Poyet Harun Fajkovic Shahrokh F. Shariat Evanguelos. Xylinas Florian Roghmann 《Urologic oncology》2018,36(5):238.e19-238.e27
Objective
To determine conditional recurrence-free survival (RFS) and progression-free survival (PFS) and improve decision-making toward surveillance protocols and scheduling. Furthermore, evaluating the evolution of predictors for disease recurrence over time, because TaG1 non–muscle-invasive bladder cancer harbors a risk of disease recurrence and progression.Material and methods
The retrospective multicenter design study includes 1,245 TaG1 bladder cancer patients with median follow-up of 62.7 (interquartile range: 34.3–91.1) months. Conditional RFS and PFS estimates were calculated using the Kaplan-Meier method. Multivariable Cox regression model was calculated proportional for the prediction of recurrence and progression (covariables: age, tumor size, multiple tumors, prior recurrence, and immediate postoperative instillation of chemotherapy).Results
After 3 months without event, the conditional RFS and PFS (to ≥pT2) rates for 5 additional years without event were 57.5% and 93.4%, respectively. Given a 1-, 2-, 3-, and 5-year survival, the conditional RFS rates for 5 additional years without event improved by +9.8 (67.3%), +5.2 (72.5%), +6.5 (79.0%), +2.0 (81.0%), and +1.0% (82.0%), respectively. In contrast, the 5-year conditional PFS rates were more or less stable with 94.3% after 1 year to 94.1% after 5 years. Multivariable analyses showed decreasing impact of risk parameters on RFS estimates over time. Based on these findings, we suggest a risk stratification to individualize follow-up for intermediate risk TaG1. Main limitation was the retrospective design.Conclusions
Conditional-survival analyses demonstrates that the patient risk profile changes over time. RFS rates rise with increasing survival whereas PFS rates were stable. The impact of prognostic features decreases over time. Our findings can be used for patient counseling and planning of personalized follow-up. 相似文献76.
77.
78.
Boon Chin Heng Husnain Khawaja Haider Abdul Jalil Rufaihah Eugene Kwang-Wei Sim 《Scandinavian cardiovascular journal : SCJ》2013,47(3):131-134
Of 141 hospital survivors after intracardiac repair of tetralogy of Fallot, eight died suddenly 6–23 years later. Compared with the other 133 patients, these eight were older at operation, with higher post-repair systolic right ventricular pressure and more often complete atrioventricular block; ventricular arrhythmia was diagnosed before death in three cases. In follow-up totalling 2255 patient years, the linearized rate of sudden death was 0.35%/year. The instantaneous risk of sudden death showed continuous increase with the length of follow-up. Of 80 survivors electrocardiographically evaluated 13–26 (median 20) years postoperatively, none had complete block, but 79 had complete right bundle branch block, including seven with left anterior hemiblock. Ventricular extrasystoles were recorded in 1% at rest, in 34% during exercise and in 83% during 24-hour ambulatory monitoring, with Lown Grade ≥II in 27%. Old age and possibly presence of fibrosis and/or fibroelastosis in right ventricular outflow tract muscle correlated independently with high Lown Grade. A patient with Lown grade III died suddenly 2 years after our follow-up. Old age at repair thus was associated with increased risk of late sudden death and with frequent ventricular arrhythmia in long-term survivors. 相似文献
79.
80.