全文获取类型
收费全文 | 1748篇 |
免费 | 180篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 64篇 |
妇产科学 | 22篇 |
基础医学 | 186篇 |
口腔科学 | 36篇 |
临床医学 | 138篇 |
内科学 | 351篇 |
皮肤病学 | 55篇 |
神经病学 | 136篇 |
特种医学 | 65篇 |
外科学 | 456篇 |
综合类 | 14篇 |
预防医学 | 67篇 |
眼科学 | 110篇 |
药学 | 87篇 |
中国医学 | 4篇 |
肿瘤学 | 114篇 |
出版年
2022年 | 20篇 |
2021年 | 43篇 |
2020年 | 17篇 |
2019年 | 29篇 |
2018年 | 53篇 |
2017年 | 29篇 |
2016年 | 20篇 |
2015年 | 30篇 |
2014年 | 40篇 |
2013年 | 80篇 |
2012年 | 120篇 |
2011年 | 131篇 |
2010年 | 67篇 |
2009年 | 73篇 |
2008年 | 95篇 |
2007年 | 88篇 |
2006年 | 85篇 |
2005年 | 67篇 |
2004年 | 69篇 |
2003年 | 61篇 |
2002年 | 71篇 |
2001年 | 37篇 |
2000年 | 43篇 |
1999年 | 47篇 |
1998年 | 15篇 |
1997年 | 17篇 |
1996年 | 21篇 |
1995年 | 13篇 |
1994年 | 12篇 |
1993年 | 18篇 |
1992年 | 43篇 |
1991年 | 35篇 |
1990年 | 26篇 |
1989年 | 20篇 |
1988年 | 15篇 |
1987年 | 21篇 |
1986年 | 23篇 |
1985年 | 22篇 |
1984年 | 17篇 |
1983年 | 13篇 |
1981年 | 11篇 |
1980年 | 13篇 |
1979年 | 20篇 |
1978年 | 10篇 |
1977年 | 9篇 |
1976年 | 9篇 |
1974年 | 18篇 |
1973年 | 9篇 |
1971年 | 7篇 |
1970年 | 12篇 |
排序方式: 共有1932条查询结果,搜索用时 15 毫秒
1.
J Bouyer J Dreyfus P Lazar D Collin G Winisdoerffer E Papiernik 《Revue d'épidémiologie et de santé publique》1988,36(2):83-88
A preterm birth prevention program was instituted in France in the early 1970s. Its effectiveness has been assessed through a perinatal study in Haguenau. A relationship between prenatal care improvement and preterm birth rate decrease was noted, but a causal interpretation cannot be derived from such an observational study. However, some arguments do support this interpretation: no satisfactory alternative explanation (such as biases in pregnancy duration measurement, change in the composition of the population of pregnant women, or secular trend), a plausible causal pattern, and a dose-response relationship between prenatal care and preterm birth rate. The Haguenau study results can be applied to other French regions, but extrapolation to other countries would depend on their social, medical and cultural contexts. 相似文献
2.
3.
4.
5.
6.
D S Krantz R J Contrada L A Durel D R Hill E Friedler J D Lazar 《Psychosomatic medicine》1988,50(6):615-626
This study compared the effects of beta-blockers differing in degree of central nervous system penetration on Type A behavior and cardiovascular reactivity to mental stress. Forty-six male hypertensives were assigned randomly to receive either highly lipophilic and nonselective propranolol, hydrophilic and cardioselective atenolol, the diuretic hydrochlorothiazide, or placebo. Subjects were administered parallel forms of the Structured Interview (SI) and performed mental arithmetic and a cognitive task prior to and after 6 weeks of therapy. Results indicated that diuretic and placebo subjects (subsequently combined into a single control group) did not differ and that both beta-blockers reduced heart rate but not blood pressure reactivity to mental stress (p less than 0.02), an effect that was strongest during the mental arithmetic test. Analysis of SI components indicated a reduction only in explosive speech for beta-blockers versus controls (p less than 0.05). For global SI classifications, seven out of 12 subjects (58%) receiving propranolol, three of 12 (25%) receiving atenolol, and four of 22 control subjects (18%) became less Type A (p less than 0.05). These data do not replicate results of a prior study obtained with atenolol and suggest that only a subset of hypertensive individuals show reduced Type A behavior with propranolol. Central nervous system mechanisms may be important in producing these effects. 相似文献
7.
8.
Monaghan Thomas F. Miller Connelly D. Agudelo Christina W. Rahman Syed N. Everaert Karel Birder Lori A. Wein Alan J. Weiss Jeffrey P. Lazar Jason M. 《International urology and nephrology》2021,53(1):35-39
International Urology and Nephrology - We aimed to determine the potential relationship between atherosclerotic cardiovascular disease (ASCVD) score, which equates to 10-year risk of... 相似文献
9.
James M. Prieto Hariharan Thangarajah Romeo C. Ignacio Stephen W. Bickler Karen M. Kling Nicholas C. Saenz Stephanie V. Garcia David A. Lazar 《Journal of pediatric surgery》2021,56(5):888-891
Background/PurposeThis study aimed to compare preoperative management strategies for patients undergoing trephination for pilonidal disease and evaluate risk factors for recurrence.MethodsA retrospective review was performed of children undergoing index surgical treatment with trephination for pilonidal disease between September 2017 and April 2019. Intraoperative and postoperative management were standardized. Demographic and perioperative data were collected and analyzed.ResultsOne-hundred twenty patients were identified with a median follow-up time of 7.5 months (interquartile range 4.1–13.2 months). Overall, 24 (20%) patients had a postoperative recurrence of pilonidal disease. Patients with multiple preoperative surgery clinic visits were less likely to have recurrent disease compared to those seen only once preoperatively (11% vs 26%, p = 0.040). Compared to patients without recurrence, those who recurred went to the operating room sooner from the time of initial surgical consultation (32 days vs 54 days, p < 0.001). Perioperative antibiotics, history of acute infection, and prior drainage procedures were not risk factors for recurrence.ConclusionsMultiple preoperative clinic visits are associated with a lower recurrence rate in children undergoing trephination for pilonidal disease. An increased duration of preoperative medical management may be responsible for this finding. Prospective study is needed to confirm these findings and identify additional factors that influence recurrence.Type of StudyTreatment Study.Level of EvidenceIII (Retrospective Comparative). 相似文献