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   23065篇
  免费   1807篇
  国内免费   72篇
耳鼻咽喉   507篇
儿科学   649篇
妇产科学   393篇
基础医学   2861篇
口腔科学   341篇
临床医学   2881篇
内科学   4335篇
皮肤病学   423篇
神经病学   2012篇
特种医学   1095篇
外科学   3574篇
综合类   423篇
一般理论   20篇
预防医学   2027篇
眼科学   434篇
药学   1469篇
中国医学   14篇
肿瘤学   1486篇
  2023年   247篇
  2022年   377篇
  2021年   925篇
  2020年   538篇
  2019年   840篇
  2018年   971篇
  2017年   605篇
  2016年   610篇
  2015年   683篇
  2014年   943篇
  2013年   1447篇
  2012年   1691篇
  2011年   1603篇
  2010年   887篇
  2009年   738篇
  2008年   1123篇
  2007年   1154篇
  2006年   998篇
  2005年   862篇
  2004年   860篇
  2003年   658篇
  2002年   619篇
  2001年   377篇
  2000年   418篇
  1999年   343篇
  1998年   196篇
  1997年   169篇
  1996年   154篇
  1995年   133篇
  1994年   129篇
  1993年   115篇
  1992年   257篇
  1991年   226篇
  1990年   229篇
  1989年   249篇
  1988年   242篇
  1987年   203篇
  1986年   268篇
  1985年   175篇
  1984年   158篇
  1983年   129篇
  1982年   99篇
  1981年   92篇
  1980年   96篇
  1979年   161篇
  1978年   99篇
  1977年   75篇
  1976年   80篇
  1975年   80篇
  1971年   75篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
151.
Introduction and objectiveResearch on the utility of meditative and mind-body (MB) practices has increased dramatically in the last two decades and both have been suggested as useful adjuncts in coping with stressors associated with cancer survivorship. There exists little data on use among genitourinary (GU) cancer survivors. This study seeks to describe meditative and MB utilization among GU cancer survivors.MethodsAnalysis of data from the 2012 and 2017 National Health Interview Survey was conducted. Patients aged 40 and older reporting a history of any cancer diagnosis (including 3 GU cancers) were included in the analysis. We explored questions about meditative and MB practices in the past 12 months. Complex Samples Logistic regression was performed to compare the relationship between cancer status and use of these practices.ResultsSelf-reported meditative practices were more prevalent in 2017 (17%) than in 2012 (5%). Patients who self-reported a cancer diagnosis of any kind were significantly more likely to utilize meditative practices. Patients with kidney cancer were significantly more likely to meditate and trended towards higher MB utilization. In contrast, bladder cancer patients were less likely to meditate and use MB practices. Increases in meditation were greater than those seen for MB in all groups.ConclusionsMeditative and MB practices increased in prevalence between 2012 and 2017 with notable heterogeneity between cancer types. Given the potential benefit, more broad incorporation into survivorship programs may be warranted. Future work should explore the significance of this heterogeneity and the utility of these practices to patients with urologic malignancy.  相似文献   
152.
153.
Context: The purpose of this report is to describe the clinical decision-making process for a patient with rheumatoid arthritis with neck pain with underlying atlantoaxial instability.Findings: The patient was evaluated for worsening upper neck pain that began insidiously 1 year prior. The patient denied numbness or tingling in her upper or lower extremities, dizziness or lightheadedness, difficulty maintaining balance with walking, or muscle weakness. Cervical spine range of motion was limited in all planes due to pain and apprehension. The patient’s neurological examination was unremarkable. Prior flexion and extension radiographs of the cervical spine were interpreted as unremarkable with alignment preserved in flexion and extension. However, upon further inspection, the cervical spine flexion radiograph was concerning for inadequate cervical motion, which may have limited the diagnostic utility of these radiographs. Additionally, a Sharp-Purser test was performed, which was positive for excessive motion. Flexion and extension radiographs of the cervical spine were then repeated ensuring the patient adequately flexed and extended during the imaging. Severe anterior subluxation of C1 relative to C2 with cervical flexion was noted, as C1 moved as much as 8–9 mm anterior to C2 with cervical flexion. Given the degree of atlantoaxial instability, the patient subsequently underwent successful posterior fusion from the occiput to C2.Conclusion/Clinical Relevance: This case report demonstrates the importance of properly screening for upper cervical spine instability in patients with rheumatoid arthritis and neck pain and understanding the importance of obtaining adequate and appropriate diagnostic imaging.  相似文献   
154.

Because the public health response to the disproportionate HIV burden faced by Black sexual minority men (BSMMM) has focused on sexual risk reduction and disease prevention, other vital components of sexual health (e.g., intimacy, pleasure, benefits of sex) have been often overlooked. Sex-positive describes a more open, holistic approach toward sex and sexuality that prioritizes these other components, though such an approach is rarely applied to BSMM's sexual health. For sex-positive BSMM, risk/preventive discourse may foster or exacerbate medical mistrust as a reaction to the dissonance between how these men view sexual health and how the medical establishment views it, which may discourage sexual healthcare-seeking. We assessed sex-positivity and its association with medical mistrust and PrEP conspiracy beliefs among 206 HIV-negative cisgender BSMM in Atlanta, Georgia. We performed exploratory factor analytic procedures on responses to a sex-positivity scale, followed by multivariable linear regressions to determine sex-positivity’s associations with medical mistrust and PrEP conspiracy beliefs. We extracted two sex-positivity factors: sexual freedom (α?=?0.90), reflecting openness toward casual sex and rejection of sexual mores, and essence of sex (α?=?0.77), reflecting the intimate, relational, and pleasurable qualities of sex. Sexual freedom was independently associated with perceived provider deception (β?=?0.19, CI?=?0.04, 0.34). Essence of sex was independently associated with PrEP conspiracy beliefs (β?=?0.16, CI?=?0.02, 0.31) and marginally associated with perceived provider deception (β?=?0.14, CI?=???0.00, 0.29). Healthcare providers and public health practitioners may cultivate greater trust with BSMM by incorporating a sex-positive approach into patient/participant interactions, clinical decision-making, and interventions. Improving access to sexual pleasure acknowledges BSMM’s right to optimal, holistic sexual health.

  相似文献   
155.
Journal of Community Health - While human papilloma virus (HPV) vaccinations and Pap smear screenings are known to improve the survival rates and incidence of cervical cancer, refugee populations...  相似文献   
156.
157.
The process by which people attempt to make sense of an event, such as hospitalization, is referred to as "meaning making" by Kegan. Because the ways in which the elderly define their feelings generated by illness and hospitalization influence their behavioral responses, understanding this interpretation increases the predictions that can be made about their behaviors. Interventions aim at helping clients integrate their experience of illness to form a new self. The nurse acts as the matrix from which patients explore the meaning of illness and hospitalization.  相似文献   
158.
159.
The pharmacokinetics of polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) in humans was studied by monitoring the blood concentrations of individuals who ingested a contaminated rice oil in Japan (yusho) in 1968 and in Taiwan (yu-cheng) in 1979. Sixteen yusho patients were followed from 1982 to 1990 and three yu-cheng individuals from 1980 to 1989. From the three yucheng patients, blood lipid values for the two persistent toxic congeners, 2,3,4,7,8-pentachlorodibenzofuran (PnCDF) and 1,2,3,4,7,8-hexachlorodibenzofuran (HxCDF), varied from 50 g/kg at first sampling to about 1 g/kg at last sampling corresponding to half-lives for elimination (t1/2) of 2-21/2 years. The blood lipid values for the same PCDF congeners in yusho patients varied from 5 g/kg down to 0.1 g/kg. The calculated t1/2 were more variable with median values closer to 10 years. Planar PCBs #126 and #169 were present at lower concentrations than the PCDFs. For seven of the other PCB congeners, half-lives for elimination in the yu-cheng individuals varied from 1.2 up to 4.6 yr depending on the degree of chlorination. For the yusho patients, the elimination for the PCBs was longer. These results show that clearance of the toxic PCDFs and PCBs in humans is non-linear with faster elimination at higher exposure followed by slower decreases as background levels are approached. Such a clearance pattern can best be explained by a two compartment liver and fat pharmacokinetic model.  相似文献   
160.
Corporate culture has been described as the shared values that drive employee satisfaction and enhance employee commitment to the organization. Therefore system leaders must know the strength of their corporate culture. Sisters of St. Francis Health Services, Inc. (SFHS), wanted to measure whether it had a strong corporate culture based on its stated values. Executives, managers, and physicians completed surveys that assessed employee job satisfaction, commitment to the organization, and perceived strength of the system's culture. The survey achieved a 68 percent response rate. SFHS learned that it had a strong culture based on tradition and that special and unique core corporate values define "systemness" throughout its different facilities. Although each facility serves significantly different functions, leaders throughout the system make everyday decisions using the same core corporate values.  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