全文获取类型
收费全文 | 1756篇 |
免费 | 192篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 39篇 |
儿科学 | 41篇 |
妇产科学 | 34篇 |
基础医学 | 208篇 |
口腔科学 | 35篇 |
临床医学 | 161篇 |
内科学 | 300篇 |
皮肤病学 | 43篇 |
神经病学 | 180篇 |
特种医学 | 32篇 |
外国民族医学 | 1篇 |
外科学 | 291篇 |
综合类 | 18篇 |
一般理论 | 1篇 |
预防医学 | 99篇 |
眼科学 | 257篇 |
药学 | 118篇 |
中国医学 | 5篇 |
肿瘤学 | 87篇 |
出版年
2023年 | 9篇 |
2022年 | 20篇 |
2021年 | 53篇 |
2020年 | 33篇 |
2019年 | 45篇 |
2018年 | 59篇 |
2017年 | 32篇 |
2016年 | 44篇 |
2015年 | 38篇 |
2014年 | 59篇 |
2013年 | 80篇 |
2012年 | 99篇 |
2011年 | 112篇 |
2010年 | 62篇 |
2009年 | 57篇 |
2008年 | 91篇 |
2007年 | 90篇 |
2006年 | 73篇 |
2005年 | 80篇 |
2004年 | 71篇 |
2003年 | 69篇 |
2002年 | 50篇 |
2001年 | 39篇 |
2000年 | 49篇 |
1999年 | 46篇 |
1998年 | 23篇 |
1997年 | 13篇 |
1996年 | 24篇 |
1995年 | 14篇 |
1994年 | 30篇 |
1993年 | 10篇 |
1992年 | 30篇 |
1991年 | 35篇 |
1990年 | 26篇 |
1989年 | 37篇 |
1988年 | 30篇 |
1987年 | 30篇 |
1986年 | 34篇 |
1985年 | 18篇 |
1984年 | 21篇 |
1983年 | 6篇 |
1982年 | 7篇 |
1981年 | 10篇 |
1979年 | 17篇 |
1978年 | 10篇 |
1976年 | 10篇 |
1974年 | 7篇 |
1973年 | 6篇 |
1970年 | 5篇 |
1969年 | 5篇 |
排序方式: 共有1950条查询结果,搜索用时 15 毫秒
61.
Gabriel de la Garza MD Oleg Militsakh MD Aru Panwar MD Tabitha L. Galloway MD Jeffrey B. Jorgensen MD Levi G. Ledgerwood MD Katelyn Kaiser MHSA Collin Kitzerow BS Yelizaveta Shnayder MD Colin A. Neumann MD Samir S. Khariwala MD MS W. Chad Spanos MD Nitin A. Pagedar MD MPH 《Head & neck》2016,38(Z1):E1188-E1191
62.
Proulx M Leduc N Vandelac L Grégoire JP Collin J 《Patient education and counseling》2007,68(1):98-106
OBJECTIVE: To identify the reasons for which people fail to take blood-pressure-lowering medication regularly, a qualitative study was conducted. METHODS: Interviews lasting approximately 90 min were conducted with 27 patients (15 women, 12 men) aged 40-70. The verbatim of the 27 interviews was first read and divided into segments with explanatory value. This was followed by the production of a final text in vignette form for all interviews. An integrative, analytical phase consisted of identifying trends, significant central themes, regularities, and divergences in the vignettes. RESULTS: Analysis revealed the explanatory power that 3 broad groups of subjective meanings could hold for given medication noncompliance scenarios. These scenarios are expressing the role of: (1) stress and living conditions in the occasional skipping or deferral of medication-taking; (2) doubt as the motivating factor for transitory, irregular medication use; (3) subjective risk as the motivating factor for persistent irregular use. CONCLUSION: Life and social contexts, doubt and risk subsume extremely meaning-rich constructs that can help identify dilemmas facing people about medication-taking. PRACTICE IMPLICATIONS: By discussing these dimensions with their patients, health professionals will be better able to understand patient medication behaviors that sometimes run counter to their recommendations. 相似文献
63.
64.
Collin Lindsay J. Ross-Driscoll Katie Nash Rebecca Miller-Kleinhenz Jasmine M. Moubadder Leah Osborn Catherine Subhedar Preeti D. Gabram-Mendola Sheryl G. A. Switchenko Jeffrey M. Ward Kevin C. McCullough Lauren E. 《Annals of surgical oncology》2022,29(8):4739-4739
Annals of Surgical Oncology - 相似文献
65.
Collin York Christopher Olm Ashley Boller Leo McCluskey Lauren Elman Jenna Haley Emily Seltzer Lama Chahine John Woo Katya Rascovsky Corey McMillan Murray Grossman 《Journal of neurology》2014,261(6):1073-1079
Patients with amyotrophic lateral sclerosis (ALS) have a motor disorder and cognitive difficulties, including difficulty with action verbs. However, the basis for the action verb impairment is unknown. Thirty-six participants with ALS and 22 with Parkinson’s disease (PD) were assessed on a simple, two-alternative forced-choice associativity judgment task, where performance was untimed and did not depend on motor functioning. We probed 120 frequency-matched action verbs, cognition verbs, concrete nouns and abstract nouns. Performance was related to T1 MRI imaging of gray matter atrophy. Patients with ALS were significantly impaired relative to healthy senior control participants only for action verbs. Patients with PD did not differ from controls for all word categories. Regression analyses related action verb performance in ALS to motor-associated cortices, but action verb judgments in PD were not related to cortical atrophy. These findings are consistent with the hypothesis that action verb difficulty in ALS is related in part to the degradation of action-related conceptual knowledge represented in motor-associated cortex. 相似文献
66.
BACKGROUND: Coeliac women may suffer from gynaecological and obstetric complications. It is possible that these complications are the first symptom of coeliac disease. AIMS: To investigate the occurrence of subclinical coeliac disease in patients with infertility or recurrent miscarriages. SUBJECTS: Women of reproductive age who were attending the hospital because of either primary or secondary infertility, or two or more miscarriages. Women undergoing sterilisation served as control subjects. METHODS: The diagnostic investigation for infertility included the endocrine status, diagnostic laparoscopy, investigation of tubal patency, postcoital test, and semen analysis of the partner. Circulating antibodies against IgA class reticulin and gliadin were used in screening for coeliac disease. In positive cases, the diagnosis was confirmed by small bowel biopsy specimens. RESULTS: Four (2.7%) of 150 women in the infertility group, and none of the 150 control subjects were found to have coeliac disease (p = 0.06). All four women with coeliac disease suffered from infertility of unexplained origin. Altogether 98 women had no discoverable reason for infertility. Thus, in this subgroup the frequency of coeliac disease was 4.1% (four of 98), the difference from the control group being statistically significant (p = 0.02). None of the coeliac women had extensive malabsorption, but two had iron deficiency anaemia. One women with coeliac disease has had a normal delivery. None of the 50 women with miscarriage had coeliac disease. CONCLUSION: Patients having fertility problems may have subclinical coeliac disease, which can be detected by serological screening tests. Silent coeliac disease should be considered in the case of women with unexplained infertility. 相似文献
67.
68.
Lelievre Benedicte Triau Stephane Codron Philippe Mariau Yoran Papin-Lefebvre Frederique Collin Alexandre Drevin Guillaume Le Roux Gael Briet Marie Boels David Letournel Franck 《Forensic Toxicology》2020,38(2):505-510
Forensic Toxicology - In developed countries, lead intoxication is decreasing in adults as sources of contamination were considerably reduced. Hence, cases of lead encephalopathy have become... 相似文献
69.
Devanand Mangar Rachel A. Karlnoski Collin J. Sprenker Katheryne L. Downes Narrene Taffe Robert Wainwright Kenneth Gustke Thomas L. Bernasek Enrico Camporesi 《Journal of anesthesia》2014,28(2):214-221
Purpose
Despite providing adequate pain relief, a femoral nerve block can induce postoperative muscle weakness after total knee arthoplasty (TKA). Fentanyl has been shown to have peripheral effects but has not been used as a perineural infusate alone after TKA.Methods
Sixty patients scheduled for TKA were randomized to one of three blinded groups: a continuous 24 h infusion of either fentanyl 3 μg/ml, ropivacaine 0.1 %, or 0.9 % normal saline through a femoral nerve sheath catheter at 10 ml/h. The main outcome was maximum voluntary isometric contraction (MVIC) in the quadriceps femoris (knee extension), measured by a handheld dynamometer (Nm/kg). Other variables assessed were preoperative and postoperative visual analog scale (VAS) scores, hamstrings MVIC (knee flexion), active range of motion of the operative knee, distance ambulated, incidence of knee buckling, supplemental morphine usage, postoperative side effects, and serum fentanyl levels.Results
Quadriceps MVIC values were significantly greater in the fentanyl group compared to the group that received ropivacaine (median values, 0.08 vs. 0.03 Nm/kg; p = 0.028). The incidence of postoperative knee buckling upon ambulation was higher in the ropivacaine group compared to the fentanyl group, although not statistically significant (40 % vs. 15 %, respectively; p = 0.077). VAS scores while ambulating were not significantly different between the fentanyl group and the ropivacaine group (p = 0.270). Postoperative morphine consumption, nausea and vomiting, and resting VAS scores were similar among the three groups.Conclusions
A continuous perineural infusion of fentanyl produced greater strength retention than ropivacaine post-TKA. 相似文献70.