全文获取类型
收费全文 | 1101307篇 |
免费 | 74674篇 |
国内免费 | 1947篇 |
专业分类
耳鼻咽喉 | 14548篇 |
儿科学 | 33675篇 |
妇产科学 | 29863篇 |
基础医学 | 151440篇 |
口腔科学 | 27593篇 |
临床医学 | 94559篇 |
内科学 | 206744篇 |
皮肤病学 | 18489篇 |
神经病学 | 91946篇 |
特种医学 | 45593篇 |
外国民族医学 | 209篇 |
外科学 | 173406篇 |
综合类 | 27818篇 |
现状与发展 | 2篇 |
一般理论 | 360篇 |
预防医学 | 92121篇 |
眼科学 | 23952篇 |
药学 | 77690篇 |
中国医学 | 2293篇 |
肿瘤学 | 65627篇 |
出版年
2018年 | 31903篇 |
2017年 | 25399篇 |
2016年 | 29248篇 |
2015年 | 9971篇 |
2014年 | 13692篇 |
2013年 | 20141篇 |
2012年 | 33282篇 |
2011年 | 49381篇 |
2010年 | 35020篇 |
2009年 | 27052篇 |
2008年 | 47103篇 |
2007年 | 52598篇 |
2006年 | 27826篇 |
2005年 | 29774篇 |
2004年 | 30570篇 |
2003年 | 31192篇 |
2002年 | 27819篇 |
2001年 | 36555篇 |
2000年 | 37410篇 |
1999年 | 31459篇 |
1998年 | 9895篇 |
1997年 | 9197篇 |
1996年 | 8931篇 |
1995年 | 8458篇 |
1994年 | 8159篇 |
1992年 | 26917篇 |
1991年 | 26406篇 |
1990年 | 25907篇 |
1989年 | 24911篇 |
1988年 | 23437篇 |
1987年 | 23072篇 |
1986年 | 21937篇 |
1985年 | 21302篇 |
1984年 | 16571篇 |
1983年 | 14161篇 |
1982年 | 9063篇 |
1981年 | 8367篇 |
1979年 | 16889篇 |
1978年 | 12223篇 |
1977年 | 10255篇 |
1976年 | 9443篇 |
1975年 | 10200篇 |
1974年 | 12724篇 |
1973年 | 12182篇 |
1972年 | 11589篇 |
1971年 | 10715篇 |
1970年 | 10281篇 |
1969年 | 9974篇 |
1968年 | 8943篇 |
1967年 | 8250篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
L. Misery E. Weisshaar E. Brenaut A.W.M. Evers F. Huet S. Ständer A. Reich E. Berardesca E. Serra-Baldrich J. Wallengren D. Linder J.W. Fluhr J.C. Szepietowski H. Maibach for the Special Interest Group on sensitive skin of the International Forum for the Study of Itch 《Journal of the European Academy of Dermatology and Venereology》2020,34(2):222-229
The special interest group on sensitive skin of the International Forum for the Study of Itch previously defined sensitive skin as a syndrome defined by the occurrence of unpleasant sensations (stinging, burning, pain, pruritus and tingling sensations) in response to stimuli that normally should not provoke such sensations. This additional paper focuses on the pathophysiology and the management of sensitive skin. Sensitive skin is not an immunological disorder but is related to alterations of the skin nervous system. Skin barrier abnormalities are frequently associated, but there is no cause and direct relationship. Further studies are needed to better understand the pathophysiology of sensitive skin – as well as the inducing factors. Avoidance of possible triggering factors and the use of well-tolerated cosmetics, especially those containing inhibitors of unpleasant sensations, might be suggested for patients with sensitive skin. The role of psychosocial factors, such as stress or negative expectations, might be relevant for subgroups of patients. To date, there is no clinical trial supporting the use of topical or systemic drugs in sensitive skin. The published data are not sufficient to reach a consensus on sensitive skin management. In general, patients with sensitive skin require a personalized approach, taking into account various biomedical, neural and psychosocial factors affecting sensitive skin. 相似文献
62.
63.
64.
65.
66.
67.
Elizabeth A. Mosley PhD MPH Amy J. Schulz PhD MPH MSW Lisa H. Harris MD PhD Barbara A. Anderson PhD 《Women & health》2020,60(7):806-820
ABSTRACT Abortion is legal in South Africa, but negative abortion attitudes remain common and are poorly understood. We used nationally representative South African Social Attitudes Survey data to analyze abortion attitudes in the case of fetal anomaly and in the case of poverty from 2007 to 2016 (n = 20,711; ages = 16+). We measured correlations between abortion attitudes and these important predictors: religiosity, attitudes about premarital sex, attitudes about preferential hiring and promotion of women, and attitudes toward family gender roles. Abortion acceptability for poverty increased over time (b = 0.05, p < .001), but not for fetal anomaly (b = ?0.008, p = .284). Highly religious South Africans reported lower abortion acceptability in both cases (Odds Ratio (OR)anomaly = 0.85, p = .015; ORpoverty = 0.84, p = .02). Premarital sex acceptability strongly and positively predicted abortion acceptability (ORanomaly = 2.63, p < .001; ORpoverty = 2.46, p < .001). Attitudes about preferential hiring and promotion of women were not associated with abortion attitudes, but favorable attitudes about working mothers were positively associated with abortion acceptability for fetal anomaly ((ORanomaly = 1.09, p = .01; ORpoverty = 1.02, p = .641)). Results suggest negative abortion attitudes remain common in South Africa and are closely tied to religiosity, traditional ideologies about sexuality, and gender role expectations about motherhood. 相似文献
68.
Soosai Manickam Amirtham Ozlem Ozbey Upasana Kachroo Boopalan Ramasamy Elizabeth Vinod 《Clinical anatomy (New York, N.Y.)》2020,33(3):343-349
Bone containing tissues such as osteochondral joint are resistant to routine tissue processing, therefore require decalcification. This technique causes removal of mineral salts, but in the process may macerate the organic tissue, hence the need for tissue fixation. Such severe processing demands careful antigen retrieval to necessitate optimal staining. The aim of our study was to compare five different antigen retrieval protocols (heat retrieval and protein digestion) following decalcification of rabbit knee joints using two different techniques (20% formic acid and 10% ethylenediamine-tetra acetic acid: EDTA). Osteochondral sections were compared based on time required for decalcification, ease of sectioning, morphological integrity using HE staining and antigen preservation (Collagen type II) using immunohistochemistry. The two decalcification solutions did not impair the tissue morphology and ease of sectioning. Joints processed with formic acid decalcified four times faster than EDTA. Among the five antigen retrieval approaches, maximal collagen II uptake with minimal nonspecific staining was found with protein digestion (pronase and hyaluronidase) in both formic acid and EDTA sections. For osteo-chondral sections, we recommend using 10% EDTA for decalcification and pronase plus hyaluronidase for antigen retrieval if maintaining tissue morphology is crucial, whereas if time is of the essence, 20% FA with pronase plus hyaluronidase is the faster option while still preserving structural integrity. Clin. Anat. 33:343–349, 2020. © 2019 Wiley Periodicals, Inc. 相似文献
69.
70.