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   6807篇
  免费   364篇
  国内免费   32篇
耳鼻咽喉   65篇
儿科学   136篇
妇产科学   105篇
基础医学   727篇
口腔科学   114篇
临床医学   420篇
内科学   2052篇
皮肤病学   66篇
神经病学   722篇
特种医学   191篇
外科学   891篇
综合类   40篇
一般理论   5篇
预防医学   440篇
眼科学   242篇
药学   438篇
  1篇
中国医学   17篇
肿瘤学   531篇
  2023年   51篇
  2022年   106篇
  2021年   226篇
  2020年   109篇
  2019年   193篇
  2018年   217篇
  2017年   168篇
  2016年   166篇
  2015年   173篇
  2014年   229篇
  2013年   351篇
  2012年   515篇
  2011年   510篇
  2010年   306篇
  2009年   270篇
  2008年   456篇
  2007年   467篇
  2006年   465篇
  2005年   417篇
  2004年   300篇
  2003年   320篇
  2002年   287篇
  2001年   98篇
  2000年   84篇
  1999年   62篇
  1998年   65篇
  1997年   45篇
  1996年   45篇
  1995年   30篇
  1994年   30篇
  1993年   20篇
  1992年   49篇
  1991年   39篇
  1990年   27篇
  1989年   38篇
  1988年   29篇
  1987年   28篇
  1986年   25篇
  1985年   19篇
  1984年   16篇
  1983年   15篇
  1982年   21篇
  1981年   14篇
  1980年   11篇
  1979年   9篇
  1978年   10篇
  1977年   7篇
  1976年   8篇
  1975年   8篇
  1974年   8篇
排序方式: 共有7203条查询结果,搜索用时 15 毫秒
91.

Introduction

Black youth with type 1 diabetes (T1D) have higher HbA1c than whites. To understand HbA1c differences, we examined the relationship of psycho-social factors and glucose testing with HbA1c.

Methods

Glucose tests per day (BGs/d) and mean blood glucose (MBG) were calculated from meter data of youth self-identified as black (n?=?33) or white (n?=?53) with T1D. HbA1c, family income, insurance status, concentrated disadvantage (CDI), psychological depression (DSC), mother educational attainment (MEA), and insulin delivery method (IDM) data was were analyzed.

Results

Black patients had significantly higher HbA1c, MBG and disadvantage measures compared to whites. BGs/d correlated with HbA1c, MBG, age and CDI. Race (p?<?0.0158), age (p?<?0.0001) and IDM (p?<?0.0036) accounted for 50% of the variability (R2?=?0.5, p?<?0.0001) in BGs/d. Regardless of age, black patients had lower BGs/d than whites. MBG (p?<?0.0001) and BGs/d (p?<?0.0001) accounted for 61% of the variance in HbA1c (p?<?0.0001).

Conclusions

BGs/d is easily assessed and closely associated with HbA1c racial disparity. BGs/d is intricately linked with greater social disadvantage. Innovative management approaches are needed to overcome obstacles to optimal outcomes.  相似文献   
92.

Background

Motor control therapeutic exercise (MCTE) for the neck is a motor relearning program that emphasizes the coordination and contraction of specific neck flexor, extensor, and shoulder girdle muscles. Because motor imagery (MI) improves sensorimotor function and it improves several motor aspects, such as motor learning, neuromotor control, and acquisition of motor skills, the authors hypothesized that a combination of MCTE and MI would improve the sensorimotor function of the cervical spine more effectively than a MCTE program alone.

Purpose

The purpose of this study was to investigate the influence of MI combined with a MCTE program on sensorimotor function of the craniocervical region in asymptomatic subjects.

Study Design

This study was a single‐blinded randomized controlled trial.

Methods

Forty asymptomatic subjects were assigned to a MCTE group or a MCTE+MI group. Both groups received the same MCTE program for the cervical region (60 minutes), but the MCTE+MI group received an additional intervention based on MI (15 minutes). The primary outcomes assessed were craniocervical neuromotor control (activation pressure value and highest pressure value), cervical kinesthetic sense (joint position error [JPE]), and the subjective perception of fatigue after effort.

Results

Intra‐group significant differences were obtained between pre‐ and post interventions for all evaluated variables (p<0.01) in the MCTE+MI and MCTE groups, except for craniocervical neuromotor control and the subjective perception of fatigue after effort in the MCTE group. In the MCTE+MI group a large effect size was found for craniocervical neuromotor control (d between ‐0.94 and ‐1.41), cervical kinesthetic sense (d between 0.97 and 2.14), neck flexor muscle endurance test (d = ‐1.50), and subjective perception of fatigue after effort (d = 0.79). There were significant inter‐group differences for the highest pressure value, joint position error (JPE) extension, JPE left rotation, and subjective perception of fatigue after effort.

Conclusion

The combined MI and MCTE intervention produced statistically significant changes in sensorimotor function variables of the craniocervical region (highest pressure value, JPE extension and JPE left rotation) and the perception of subjective fatigue compared to MCTE alone. Both groups showed statistically significant changes in all variables measured, except for craniocervical neuromotor control and the subjective perception of fatigue after effort in the MCTE group

Level of Evidence

1b  相似文献   
93.
During the last few years, the number of patients receiving anticoagulant and antiplatelet therapy has increased worldwide. Since this is a chronic treatment, patients receiving it can be expected to need some kind of surgery or intervention during their lifetime that may require treatment discontinuation. The decision to withdraw antithrombotic therapy depends on the patient's thrombotic risk versus hemorrhagic risk. Assessment of both factors will show the precise management of anticoagulant and antiplatelet therapy in these scenarios. The aim of this consensus document, coordinated by the Cardiovascular Thrombosis Working Group of the Spanish Society of Cardiology, and endorsed by most of the Spanish scientific societies of clinical specialities that may play a role in the patient-health care process during the perioperative or periprocedural period, is to recommend some simple and practical guidelines with a view to homogenizing daily clinical practice.Full English text available from: www.revespcardiol.org/en  相似文献   
94.
95.
96.
97.
One way to speed up the TB drug discovery process is to search for antitubercular activity among compound series that already possess some of the key properties needed in anti-infective drug discovery, such as whole-cell activity and oral absorption. Here, we present MGIs, a new series of Mycobacterium tuberculosis gyrase inhibitors, which stem from the long-term efforts GSK has dedicated to the discovery and development of novel bacterial topoisomerase inhibitors (NBTIs). The compounds identified were found to be devoid of fluoroquinolone (FQ) cross-resistance and seem to operate through a mechanism similar to that of the previously described NBTI GSK antibacterial drug candidate. The remarkable in vitro and in vivo antitubercular profiles showed by the hits has prompted us to further advance the MGI project to full lead optimization.  相似文献   
98.
The association of socialization patterns with unprotected anal intercourse (UAI) and HIV/STI prevalence remains underexplored in men who have sex with men (MSM) and transgender women (TW) in developing country settings. We evaluated the correlation of UAI, HIV, and syphilis with MSM/TW venue attendance and social network size among high-risk MSM and TW in Peru according to self-reported sexual identity. Frequency of venue attendance and MSM/TW social network size were lowest among heterosexual MSM and highest among TW respondents. Attendance (frequent or occasional) at MSM/TW venues was associated with increased odds of insertive UAI among heterosexual participants. Frequent venue attendance was associated with increased odds of receptive UAI among gay/homosexual, bisexual, and TW participants. Further investigation of the differing socialization patterns and associations with HIV/STI transmission within subgroups of Peruvian MSM and TW will enable more effective prevention interventions for these populations.  相似文献   
99.
100.
Pathogenic strains of Acanthamoeba genus are the causative agents of fatal granulomatous amoebic encephalitis and a serious sight-threatening infection of the eye known as Acanthamoeba keratitis. In a previous study, Acanthamoeba strains were isolated from nasal swabs collected from healthy individuals in Peru. In the present study, the pathogenic potential of the isolated strains was established based on temperature and osmotolerance assays as well as the secretion rate of extracellular proteases. Based on these experiments, four strains that showed the highest pathogenic potential were selected for sensitivity assays against two molecules (voriconazole and chlorhexidine) which are currently used for the treatment of Acanthamoeba infections. After performing sensitivity and activity assays, it was found that both drugs were active against the tested strains. However, voriconazole showed higher activity against the studied strains compared to chlorhexidine. Therefore, voriconazole should be established as a first-line treatment against Acanthamoeba infections at least in the studied region of Peru.  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