全文获取类型
收费全文 | 21163篇 |
免费 | 1256篇 |
国内免费 | 229篇 |
专业分类
耳鼻咽喉 | 139篇 |
儿科学 | 1243篇 |
妇产科学 | 326篇 |
基础医学 | 2547篇 |
口腔科学 | 384篇 |
临床医学 | 1381篇 |
内科学 | 3659篇 |
皮肤病学 | 423篇 |
神经病学 | 1345篇 |
特种医学 | 849篇 |
外国民族医学 | 5篇 |
外科学 | 2843篇 |
综合类 | 818篇 |
一般理论 | 1篇 |
预防医学 | 1474篇 |
眼科学 | 1084篇 |
药学 | 2077篇 |
6篇 | |
中国医学 | 316篇 |
肿瘤学 | 1728篇 |
出版年
2022年 | 270篇 |
2021年 | 415篇 |
2020年 | 284篇 |
2019年 | 307篇 |
2018年 | 386篇 |
2017年 | 317篇 |
2016年 | 388篇 |
2015年 | 438篇 |
2014年 | 624篇 |
2013年 | 815篇 |
2012年 | 1126篇 |
2011年 | 1157篇 |
2010年 | 706篇 |
2009年 | 605篇 |
2008年 | 959篇 |
2007年 | 990篇 |
2006年 | 898篇 |
2005年 | 865篇 |
2004年 | 765篇 |
2003年 | 772篇 |
2002年 | 716篇 |
2001年 | 637篇 |
2000年 | 648篇 |
1999年 | 591篇 |
1998年 | 314篇 |
1997年 | 302篇 |
1996年 | 252篇 |
1995年 | 234篇 |
1994年 | 181篇 |
1993年 | 196篇 |
1992年 | 375篇 |
1991年 | 396篇 |
1990年 | 359篇 |
1989年 | 415篇 |
1988年 | 315篇 |
1987年 | 333篇 |
1986年 | 258篇 |
1985年 | 285篇 |
1984年 | 242篇 |
1983年 | 218篇 |
1982年 | 138篇 |
1981年 | 123篇 |
1979年 | 188篇 |
1978年 | 128篇 |
1977年 | 117篇 |
1975年 | 136篇 |
1974年 | 143篇 |
1973年 | 137篇 |
1972年 | 124篇 |
1971年 | 142篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
The midwifery art has emphasised the uniqueness of human beings throughout its Nordic history. The educated Nordic midwife has in the last decade celebrated several hundred years of memories. This article studies how the key ideas of the midwifery art and patterns of ideas become evident in the zeitgeist from the beginning of the 19th century to the millennium in the Nordic countries. The legacy and pattern of ideas of the art of midwifery are interpreted in relation to the texts of the selected historical sources and based on Ricoeur's phenomenological-hermeneutic approach to the text and further to the dedication of understanding and interpretation. The historical sources refer to unprinted primary sources from historical archives and printed secondary and tertiary sources. The patterns of ideas include a tripartite whole: the true cultivation of the head, the philosophy and aesthetics of the hand, the strength of the heart and the drive of calling. These ideas open for unique visions and attest to the evident in modern midwives. Today's midwives have academic training with examinations, and the education is based on scientific evidence. The midwife profession is authorised by the state and supervised by the authorities. 相似文献
2.
3.
5.
Parupudi V J Sriram Guduru V Rao Nageshwar D Reddy 《Indian journal of gastroenterology》2006,25(1):39-41
Endoscopic clips have been used mainly for control of gastrointestinal (GI) bleeding and occasionally for closure of GI perforations. However, closure of spontaneous esophageal perforation (Boerhaave's syndrome) by clipping has not been reported. We described successful non-surgical closure of spontaneous esophageal perforation by endoscopic clipping in a patient with bilateral pyopneumothorax and septicemia. 相似文献
6.
7.
K S Rao N Ananthakrishnan A Banerjee 《The Australian and New Zealand journal of surgery》1988,58(9):723-726
A total of 50 consecutive patients who were treated in JIPMER Hospital between 1970 and 1981 for corrosive injuries of the oesophagus and stomach were analysed. There were 23 males and 27 females. All but seven presented with dysphagia due to an established stricture. In addition seven of them had associated stricture of the stomach. They were treated with either repeated dilatations or, in selected cases, oesophageal replacement. Perforation of the oesophagus is an important complication associated with oesophageal dilatation indicating the need for oesophageal replacement in multiple or long dense strictures. Results are quite satisfactory with both modalities of treatment. However, oesophageal replacement surgery, performed properly in selected cases, offers a permanent solution to these unfortunate victims. 相似文献
8.
Birth weight on 12,644 singleton infants from 6,196 sibships born in Maryland between 1980 and 1984 were used to estimate the effects of nine maternal and infant covariates on the sibship correlation in birth weight. Assuming a homogeneous correlation across all families, the estimated intraclass correlation was 0.4664 (+/- 0.0099). This high sibship correlation makes it possible to predict, with reasonable accuracy, the birth weight of a child given information on previous sibs, as well as covariates on the mother and/or infant pertinent to a given pregnancy. The reduction in variance associated with incorporating information on the nine covariates used here was approximately equal to that obtained by conditioning on a single previous sib. Testing for heterogeneity in correlation among different groups of families showed that a crude measure of parity (first live birth vs. other), time between births, mother's marital status, and maternal age at the birth of the last child significantly influenced the sibship correlation in birth weight. 相似文献
9.
10.