全文获取类型
收费全文 | 14312篇 |
免费 | 1146篇 |
国内免费 | 61篇 |
专业分类
耳鼻咽喉 | 125篇 |
儿科学 | 351篇 |
妇产科学 | 343篇 |
基础医学 | 1993篇 |
口腔科学 | 375篇 |
临床医学 | 1600篇 |
内科学 | 3008篇 |
皮肤病学 | 245篇 |
神经病学 | 1031篇 |
特种医学 | 789篇 |
外国民族医学 | 17篇 |
外科学 | 1840篇 |
综合类 | 154篇 |
一般理论 | 6篇 |
预防医学 | 1324篇 |
眼科学 | 176篇 |
药学 | 944篇 |
中国医学 | 20篇 |
肿瘤学 | 1178篇 |
出版年
2021年 | 179篇 |
2020年 | 129篇 |
2019年 | 195篇 |
2018年 | 257篇 |
2017年 | 162篇 |
2016年 | 243篇 |
2015年 | 259篇 |
2014年 | 342篇 |
2013年 | 473篇 |
2012年 | 632篇 |
2011年 | 628篇 |
2010年 | 372篇 |
2009年 | 400篇 |
2008年 | 599篇 |
2007年 | 594篇 |
2006年 | 588篇 |
2005年 | 566篇 |
2004年 | 541篇 |
2003年 | 559篇 |
2002年 | 530篇 |
2001年 | 520篇 |
2000年 | 560篇 |
1999年 | 495篇 |
1998年 | 228篇 |
1997年 | 195篇 |
1996年 | 189篇 |
1995年 | 163篇 |
1994年 | 134篇 |
1993年 | 138篇 |
1992年 | 364篇 |
1991年 | 312篇 |
1990年 | 301篇 |
1989年 | 279篇 |
1988年 | 291篇 |
1987年 | 240篇 |
1986年 | 264篇 |
1985年 | 246篇 |
1984年 | 196篇 |
1983年 | 180篇 |
1982年 | 115篇 |
1981年 | 105篇 |
1980年 | 116篇 |
1979年 | 152篇 |
1978年 | 119篇 |
1977年 | 106篇 |
1976年 | 83篇 |
1975年 | 87篇 |
1974年 | 105篇 |
1973年 | 116篇 |
1971年 | 86篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Zusammenfassung Bei 10 Patientinnen mit puerperaler Mastitis wurde der Absze? durch wiederholte Punktion, kombiniert nit einer systemischen
Antibiotikagabe behandelt. Bei 1 Patientin wurde eine infizierte Milchzyste drainiert. Mit 3–6 Punktionen und einer Therapiedauer
von 7–10 Tagen ist der therapeutische Aufwand dieser Methode deutlich geringer als beim Standardverfahren Inzision und Drainage
(3–4 Wochen). Die Mütter k?nnen weiterstillen. 相似文献
32.
Bruce F. Waller Charles M. Orr James Van Tassel Thomas Peters Edward Fry James Hermiller Larry D. Grider 《Clinical cardiology》1997,20(1):67-74
Catheter balloon angioplasty is a well accepted form of nonsurgical treatment of acutely and chronically obstructed coronary artery vessels. It is also the centerpiece for various new intervention techniques. Their morphologic effect on the site of obstruction has been termed “remodeling.” Part V of this six-part series focuses on remodeling effects of balloon angioplasty on obstructed young (≤ 1 year) and old (> 1 year) saphenous vein bypass grafts. 相似文献
33.
V R Preedy C D Gove M Z Panos R Sherwood B Portmann R Williams T J Peters 《Alcohol and alcoholism (Oxford, Oxfordshire)》1990,25(6):641-649
(1) Liver cirrhosis was induced in male rats by treatment with carbon tetrachloride and phenobarbitone for 130-142 days. Detailed histological examination showed all livers from rats treated with carbon tetrachloride had annular fibrosis, necrosis, loss of normal hepatic architecture and other features that were consistent with an established micronodular cirrhosis. (2) Plasma biochemical analysis showed a significant reduction in total protein concentration (13%), which was due entirely to a reduction in plasma albumin (29%). There were also large increases in the plasma activities of alkaline phosphatase (110%) and aspartate aminotransferase (159%), when compared to phenobarbitone-treated controls. Plasma cholesterol was also increased (67%), but other plasma analytes were not significantly altered. (3) The soleus (Type I), plantaris (Type II) and gastrocnemius (Types I and II) muscles were dissected and examined for possible differential effects. There were minor reductions in all three muscle weights, but these changes did not reach statistical significance. The protein, RNA and DNA concentrations, total muscle content and content relative to body weight in cirrhotic rats were also not significantly altered in any of the muscles. Cirrhosis did not cause any perturbations in derived parameters, i.e. amount of synthetic apparatus per cell, RNA/DNA ratio, apparent cell size, protein/DNA ratio and the capacity for protein synthesis or RNA/protein ratio. (4) The gastrocnemius was fractionated into soluble, stromal and myofibrillar proteins. The concentrations and contents of all three proteins were unaltered in cirrhotic animals, compared to controls. (5) It is concluded that in this experimental model of cirrhosis there were no effects on those skeletal muscle variables which are strikingly altered by chronic alcohol feeding.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
34.
Angelika Heese Ulrike Lacher Hans Uwe Koch Janna Kubosch Yasmin Ghane Klaus-Peter Peters 《Der Hautarzt; Zeitschrift für Dermatologie, Venerologie, und verwandte Gebiete》1996,47(11):817-824
Zusammenfassung
Die Typ I-Allergien gegen Latex sind in den vergangenen Jahren zu einem zunehmenden berufsdermatologischen Problem geworden,
zumal mindestens 10% der Angestellten im Gesundheitswesen betroffen sind. In der Dermatologischen Klinik der Universit?t Erlangen-Nürnberg
stieg die Anzahl der j?hrlich diagnostizierten Patienten mit Latexallergien von 1989 bis 1995 auf das 12fache, wobei der Anteil
der schweren, generalisierten Formen der Erkrankung von 10,7% (1989/1990) auf 44% (1994/1995) zunahm.
Unter den m?glichen Ausl?sern der Latexallergie (wasserl?sliche Proteine mit Molekulargewichten von 2 bis 200 kD) sind mindestens
5 Hauptproteine mit bereits bekannter Prim?rstruktur zu berücksichtigen. Zus?tzlich gibt es Hinweise für Markerproteine, die
in bestimmten Risikogruppen geh?uft zur Ausl?sung spezifischer IgE-Antik?rper führen (z.B. 46 kD-Protein in medizinischen
Berufen, 14,6 kD- und 27 kD-Proteine bei Kindern mit Spina bifida). Das Vorkommen von Kreuzreaktionen zwischen Latex und unterschiedlichen
Früchten (besonders Avocado, Kiwi, Banane, E?kastanie) bei 60 bis 70% der Latexallergiker ist bei der allergologischen Abkl?rung
und Beratung dieser Patienten zu beachten. Wesentliche Aspekte der Prophylaxe umfassen die konsequente Umstellung medizinischer
Einrichtungen auf ungepuderte Latexhandschuhe mit niedrigem Proteingehalt. Eine Zusammenstellung von OP- und Untersuchungshandschuhen,
welche Angaben über die von uns ermittelten Proteinkonzentrationen (modifizierte Lowry-Methode und Hochdruck-Flüssigkeits-Chromatographie,
HPLC) enth?lt, soll ein Leitfaden bei der Auswahl allergologisch geeigneter Handschuhe sein.
Eingegangen am 10. August 1996 Angenommen am 21. August 1996 相似文献
35.
36.
In order to identify risk factors for preterm birth in singletons, data from a population-based case control survey on the island of Curacao were re-analysed. Both medical and sociodemographic variables were examined. Overall, a history of previous preterm birth and severe hypertension during the index pregnancy were indicators of adverse pregnancy outcome, in terms of preterm birth. The contribution of sociodemographic factors to the risk of preterm birth is relatively low. 相似文献
37.
38.
A comprehensive study of smoking in primary school children in Hong Kong: implications for prevention. 下载免费PDF全文
J Peters A J Hedley T H Lam C L Betson C M Wong 《Journal of epidemiology and community health》1997,51(3):239-245
STUDY OBJECTIVE: To identify factors associated with smoking behaviour in primary school children in Hong Kong. DESIGN: A cross sectional survey in which both children and parents completed questionnaires. The main outcome measure was the smoking status of the children; and risk factors (knowledge of and attitude to smoking and demographic and socioeconomic background) were identified as predictors of ever/never smoking. SETTING AND SUBJECTS: Altogether 9598 primary school children, aged 8-13 years, and attending 27 schools from two districts in Hong Kong participated. MAIN RESULTS: The prevalence of ever-smoking was 12% (1119)-15% (760) in boys and 7% (359) in girls. It ranged from 3% in 8 year old girls to 52% in 13 year old boys. The factors associated with ever-smoking included the following: being a boy (adjusted odds ratio 2.21; 95% confidence interval 1.89, 2.59), increasing age per year (1.48; 1.40, 1.57), living in Kwai Tsing district (1.29; 1.10, 1.50), having one or more smokers at home (2.07; 1.78, 2.39), and having a father who was not working (1.41; 1.19, 1.67). Children who were ever-smokers had both seen and approved of their friends' smoking (8.79; 5.33, 14.50), had a more positive attitude towards smoking (3.35; 2.21, 5.09), and were more successful in recognising cigarette brand names and logos (1.67; 1.42, 1.96), but they lacked confidence (1.78; 1.32, 2.39). CONCLUSIONS: The influences on child smoking are multifactorial and programmes in Hong Kong are falling to curb them. The control of these risk factors must be incorporated in the smoking prevention policy of Hong Kong and supported by future enforced legislation. 相似文献
39.
40.
Invasive pulmonary aspergillosis is characterized by radiological signs allowing a correct diagnosis, including differentiation from pulmonary candidiasis, when they are associated with appropriate clinical symptoms (neutropenia and fever persisting despite broad-spectrum antibiotics). In particular the formation of a pulmonary mycetoma in a previously normal lung is one of these signs. Unlike a simple fungus ball (the saprophytic form of aspergillosis), the rounded density of invasive pulmonary aspergillosis consists of sequestrum of devitalized lung tissue owing to blood vessel invasion by Aspergillus hyphae. This morphologic phenomenon is demonstrated in the present case report and is discussed together with the other roentgenological signs of the invasive aspergillosis. 相似文献