全文获取类型
收费全文 | 2558996篇 |
免费 | 200088篇 |
国内免费 | 4204篇 |
专业分类
耳鼻咽喉 | 36402篇 |
儿科学 | 86735篇 |
妇产科学 | 72478篇 |
基础医学 | 363860篇 |
口腔科学 | 72989篇 |
临床医学 | 226729篇 |
内科学 | 500518篇 |
皮肤病学 | 54937篇 |
神经病学 | 205323篇 |
特种医学 | 102037篇 |
外国民族医学 | 1064篇 |
外科学 | 389063篇 |
综合类 | 60745篇 |
现状与发展 | 4篇 |
一般理论 | 866篇 |
预防医学 | 197588篇 |
眼科学 | 58890篇 |
药学 | 192070篇 |
9篇 | |
中国医学 | 4924篇 |
肿瘤学 | 136057篇 |
出版年
2018年 | 25050篇 |
2016年 | 21352篇 |
2015年 | 24518篇 |
2014年 | 33949篇 |
2013年 | 52038篇 |
2012年 | 70608篇 |
2011年 | 74899篇 |
2010年 | 44667篇 |
2009年 | 42490篇 |
2008年 | 71617篇 |
2007年 | 76041篇 |
2006年 | 76868篇 |
2005年 | 74786篇 |
2004年 | 73225篇 |
2003年 | 70400篇 |
2002年 | 68970篇 |
2001年 | 119888篇 |
2000年 | 124360篇 |
1999年 | 105594篇 |
1998年 | 29107篇 |
1997年 | 26364篇 |
1996年 | 26635篇 |
1995年 | 25694篇 |
1994年 | 24251篇 |
1993年 | 22697篇 |
1992年 | 86125篇 |
1991年 | 84000篇 |
1990年 | 82193篇 |
1989年 | 78869篇 |
1988年 | 73131篇 |
1987年 | 72029篇 |
1986年 | 67981篇 |
1985年 | 65542篇 |
1984年 | 49122篇 |
1983年 | 42094篇 |
1982年 | 24690篇 |
1981年 | 22212篇 |
1980年 | 20524篇 |
1979年 | 46021篇 |
1978年 | 32115篇 |
1977年 | 27080篇 |
1976年 | 25487篇 |
1975年 | 27218篇 |
1974年 | 32753篇 |
1973年 | 31561篇 |
1972年 | 29029篇 |
1971年 | 26908篇 |
1970年 | 25010篇 |
1969年 | 23233篇 |
1968年 | 21220篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
R. E. J. Ryder 《Diabetic medicine》2015,32(3):305-313
On 8 April 2014, a US jury ordered Takeda and Eli Lilly to pay $9 bn in punitive damages after finding that they had concealed the cancer risks associated with pioglitazone. By contrast, on 28 August 2014, the long‐awaited outcome of the 10‐year Kaiser Permanente Northern California study was announced. That study was specifically designed to investigate whether patients exposed to pioglitazone were at an increased risk of bladder cancer and found no association; thus, at last, the controversial issue has been resolved. A review, in retrospect, of the story of the proposed link between pioglitazone and bladder cancer reveals flaws at every stage. In 2012, a BMJ editorial, in keeping with some other contemporary reports, stated ‘it can confidently be assumed that pioglitazone increases the risk of bladder cancer’. Examination of the information which led to such a statement shows that: 1) the pre‐clinical findings of bladder cancer in male rats is not indicative of human risk; 2) there is no association between bladder cancer and pioglitazone in randomized controlled trials, once cases that could not plausibly be related to treatment are removed; and 3) the observational studies that have suggested a link have over‐extrapolated from the data: pioglitazone‐treated patients had more risk factors for bladder cancer than those not treated with pioglitazone. Meanwhile careful study of randomized controlled trials shows evidence of cardiovascular benefit from pioglitazone in Type 2 diabetes, a condition which results, more than anything, in premature cardiovascular death and morbidity. 相似文献
72.
M. Alexandra Friedman Charlotte M. Niznik Janelle R. Bolden Lynn M. Yee 《Journal of community health》2016,41(2):354-358
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information. 相似文献
73.
74.
75.
76.
77.
78.
B. Siska I. Machac P. Dolecek J. Martiska 《Pharmaceutical development and technology》2019,24(1):80-88
Rheological behaviour of pharmaceutical semisolid preparations significantly affects manufacturing process, administration, stability, homogeneity of incorporated drug, accuracy of dosing, adhesion in the place of application, drug release, and resulting therapeutic effect of the product. We performed test of consistency by penetrometry, rotational, oscillation and creep tests, and squeeze and tack tests of model samples to introduce methods suitable for characterization and comparison of semisolids in practice. Penetrometry is a simple method allowing sorting the semisolids to low and high stress-resistant materials but deficient for rheological characterization of semisolids. Value of yield stress, generally considered to be appropriate feature of semisolids, is significantly influenced by the method of testing and the way of evaluation. The hysteresis loops of model semisolids revealed incomplete thixotropy, therefore, three-step thixotropy test was employed. Semisolids showed nonlinear response in the creep phase of tests and partial recovery of structure by storing energy in the recovery phase. Squeeze and tack tests seem to be convenient ways for comparison of semisolids. Our study can contribute to a better understanding of different flow behaviour of semisolids given by different physicochemical properties of excipients and can bring useful approaches to evaluation and comparison of semisolids in practice. 相似文献
79.
80.
Clint R. Bellenger John B. Arnold Jonathan D. Buckley Dominic Thewlis Joel T. Fuller 《Journal of Science and Medicine in Sport》2019,22(3):294-299