全文获取类型
收费全文 | 5019篇 |
免费 | 475篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 99篇 |
妇产科学 | 126篇 |
基础医学 | 750篇 |
口腔科学 | 234篇 |
临床医学 | 626篇 |
内科学 | 973篇 |
皮肤病学 | 43篇 |
神经病学 | 372篇 |
特种医学 | 183篇 |
外科学 | 605篇 |
综合类 | 104篇 |
一般理论 | 7篇 |
预防医学 | 551篇 |
眼科学 | 36篇 |
药学 | 423篇 |
中国医学 | 8篇 |
肿瘤学 | 314篇 |
出版年
2021年 | 77篇 |
2020年 | 55篇 |
2019年 | 77篇 |
2018年 | 88篇 |
2017年 | 74篇 |
2016年 | 74篇 |
2015年 | 85篇 |
2014年 | 106篇 |
2013年 | 145篇 |
2012年 | 246篇 |
2011年 | 256篇 |
2010年 | 123篇 |
2009年 | 117篇 |
2008年 | 218篇 |
2007年 | 216篇 |
2006年 | 252篇 |
2005年 | 215篇 |
2004年 | 211篇 |
2003年 | 172篇 |
2002年 | 181篇 |
2001年 | 176篇 |
2000年 | 189篇 |
1999年 | 125篇 |
1998年 | 67篇 |
1997年 | 59篇 |
1996年 | 46篇 |
1995年 | 60篇 |
1994年 | 56篇 |
1993年 | 50篇 |
1992年 | 107篇 |
1991年 | 124篇 |
1990年 | 104篇 |
1989年 | 84篇 |
1988年 | 57篇 |
1987年 | 86篇 |
1986年 | 96篇 |
1985年 | 82篇 |
1984年 | 65篇 |
1983年 | 62篇 |
1982年 | 39篇 |
1981年 | 33篇 |
1979年 | 62篇 |
1978年 | 45篇 |
1977年 | 42篇 |
1976年 | 33篇 |
1975年 | 41篇 |
1974年 | 48篇 |
1973年 | 34篇 |
1972年 | 45篇 |
1969年 | 41篇 |
排序方式: 共有5500条查询结果,搜索用时 62 毫秒
121.
We present the case of a 38-year-old right-hand-dominant female with a longstanding extensive high flow arteriovenous malformation (AVM) affecting the left hand and forearm. The patient’s main complaints were altered sensation in the left hand and difficulty with co-ordination. Clinical examination revealed reduced global sensibility in the hand and evidence of a vascular steal phenomenon resulting in a cold thumb and small finger without trophic changes. Subsequent nerve conduction studies identified peripheral neuropathy affecting the median, ulnar and radial nerves. There was no evidence of entrapment neuropathy and the findings were attributed to nerve ischemia as a result of the steal phenomenon. This case represents an unusual complication of an AVM of the upper limb which has not been reported previously to our knowledge. Patients with complex AVMs presenting with atypical peripheral neuropathies should be assessed for the possibility of steal phenomenon.Level of Evidence: Level V, risk/prognostic study. 相似文献
122.
123.
Julie Page Kim Roos Andreas Bänziger Isabel Margot-Cattin Stefania Agustoni Emmanuelle Rossini 《Scandinavian journal of occupational therapy》2015,22(6):403-415
Background: The contemporary occupational therapy literature suggests that different quality criteria exist for setting goals in occupational therapy: a focus on occupation; a link to the International Classification of Functioning, Disability, and Health (ICF); and adherence to the SMART recommendations, which advises goals to be specific, measurable, agreed, realistic, and timed. Aim: To identify the extent to which Swiss occupational therapists (OTs) adhere to the criteria cited above. Material: A total of 1 129 goals formulated with the Goal Attainment Scale (GAS) collected in 2008. Results: In slightly more than half the investigated cases at least one goal addressed an aspect of occupation. Nearly two-thirds of the goals related to the ICF component “activity and participation”. Nearly 90% of the goals were specific, measurable, and/or realistic. Conclusions: Goals mirror, to some extent, what is done in everyday practice. Several influences on goal formulations of OTs were identified, including the practice models traditionally used in different specialist fields; the cultural contexts in which OTs were trained; and the legal framework that obliges OTs to formulate their goals in a certain way in order to obtain funding for their services. Significance: Based on these results evidence-based products have been developed (a further education course; written recommendations for practice). 相似文献
124.
125.
126.
Andrew S. Bowman Sarah W. Nelson Shannon L. Page Jacqueline M. Nolting Mary L. Killian Srinand Sreevatsan Richard D. Slemons 《Emerging infectious diseases》2014,20(9):1472-1480
Agricultural fairs provide an opportunity for bidirectional transmission of influenza A viruses. We sought to determine influenza A virus activity among swine at fairs in the United States. As part of an ongoing active influenza A virus surveillance project, nasal swab samples were collected from exhibition swine at 40 selected Ohio agricultural fairs during 2012. Influenza A(H3N2) virus was isolated from swine at 10 of the fairs. According to a concurrent public health investigation, 7 of the 10 fairs were epidemiologically linked to confirmed human infections with influenza A(H3N2) variant virus. Comparison of genome sequences of the subtype H3N2 isolates recovered from humans and swine from each fair revealed nucleotide identities of >99.7%, confirming zoonotic transmission between swine and humans. All influenza A(H3N2) viruses isolated in this study, regardless of host species or fair, were >99.5% identical, indicating that 1 virus strain was widely circulating among exhibition swine in Ohio during 2012. 相似文献
127.
Adam W. Carrico Ean Nil Chhit Sophal Ellen Stein Muth Sokunny Neak Yuthea Jennifer L. Evans Song Ngak Lisa Maher Kimberly Page 《Journal of behavioral medicine》2016,39(3):502-510
Conditional cash transfer (CCT) and cognitive-behavioral treatments are evidence-based approaches to reduce stimulant use and sexual risk taking. We describe the adaptation and implementation of sequential behavioral interventions for Cambodian female entertainment and sex workers (FESW) who use amphetamine-type stimulants (ATS): (1) a 12-week CCT intervention; and (2) a 4-week cognitive-behavioral aftercare (AC) group. An ongoing cluster randomized stepped wedge trial in 10 Cambodian provinces is enrolling FESW with confirmed recent ATS use to examine the effectiveness of CCT + AC. In the first six provinces, 138 of the 183 eligible FESW (75 %) enrolled in CCT and completed a median of 25 (interquartile range 9–32) of the 36 urine screening visits. Of the 84 participants who were eligible for AC, 79 completed at least one session (94 %) and 57 completed three or more sessions (68 %). Culturally tailored behavioral interventions to reduce ATS use and optimize HIV prevention are feasible in resource-limited settings. 相似文献
128.
129.
Priya Palta G. Page R. L. Piferi J. M. Gill M. J. Hayat A. B. Connolly S. L. Szanton 《Journal of urban health》2012,89(2):308-316
Hypertension affects a large proportion of urban African-American older adults. While there have been great strides in drug
development, many older adults do not have access to such medicines or do not take them. Mindfulness-based stress reduction
(MBSR) has been shown to decrease blood pressure in some populations. This has not been tested in low-income, urban African-American
older adults. Therefore, the primary purpose of this pilot study was to test the feasibility and acceptability of a mindfulness-based
program for low income, minority older adults provided in residence. The secondary purpose was to learn if the mindfulness-based
program produced differences in blood pressure between the intervention and control groups. Participants were at least 62 years
old and residents of a low-income senior residence. All participants were African-American, and one was male. Twenty participants
were randomized to the mindfulness-based intervention or a social support control group of the same duration and dose. Blood
pressure was measured with the Omron automatic blood pressure machine at baseline and at the end of the 8-week intervention.
A multivariate regression analysis was performed on the difference in scores between baseline and post-intervention blood
pressure measurements, controlling for age, education, smoking status, and anti-hypertensive medication use. Effect sizes
were calculated to quantify the magnitude of the relationship between participation in the mindfulness-based intervention
and the outcome variable, blood pressure. Attendance remained >80% in all 8 weeks of both the intervention and the control
groups. The average systolic blood pressure decreased for both groups post-intervention. Individuals in the intervention group
exhibited a 21.92-mmHg lower systolic blood pressure compared to the social support control group post-intervention and this
value was statistically significant (p = 0.020). The average diastolic blood pressure decreased in the intervention group post-intervention, but increased in the
social support group. Individuals in the intervention group exhibited a 16.70-mmHg lower diastolic blood pressure compared
to the social support group post-intervention, and this value was statistically significant (p = 0.003). Older adults are at a time in life when a reflective, stationary intervention, delivered in residence, could be
an appealing mechanism to improve blood pressure. Given our preliminary results, larger trials in this hypertensive study
population are warranted. 相似文献
130.
Prasanthi Maddali Marc Moisi Jeni Page Parthasarathi Chamiraju Christian Fisahn Rod Oskouian R. Shane Tubbs 《Clinical anatomy (New York, N.Y.)》2017,30(3):342-346
Epidural anesthesia is a versatile technique widely used in treating lumbar spinal pain syndromes. Complications during these procedures can arise either from needle placement or from administration of medication. Potential risks include infection, hematoma, intravascular or subdural injections of medication, direct nerve trauma, air embolism, entry into a disc space, urinary retention, radiation exposure, and hypersensitivity reactions. The objective of this article is to review the complications of lumbar epidural injections and discuss the potential pitfalls related to these procedures. We searched Medline comprehensively for relevant case reports, clinical trials, and review articles. Complications from lumbar epidural injections are extremely rare. Most if not all of them can be avoided by careful techniques with accurate needle placement, sterile precautions, and a thorough understanding of the relevant anatomy and contrast patterns on fluoroscopic imaging. Clin. Anat. 30:342–346, 2017. © 2017 Wiley Periodicals, Inc. 相似文献