全文获取类型
收费全文 | 1286篇 |
免费 | 46篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 67篇 |
妇产科学 | 18篇 |
基础医学 | 135篇 |
口腔科学 | 25篇 |
临床医学 | 220篇 |
内科学 | 294篇 |
皮肤病学 | 33篇 |
神经病学 | 27篇 |
特种医学 | 306篇 |
外科学 | 87篇 |
综合类 | 26篇 |
预防医学 | 38篇 |
眼科学 | 6篇 |
药学 | 71篇 |
肿瘤学 | 59篇 |
出版年
2022年 | 3篇 |
2021年 | 8篇 |
2019年 | 14篇 |
2018年 | 10篇 |
2017年 | 9篇 |
2016年 | 12篇 |
2015年 | 20篇 |
2014年 | 13篇 |
2013年 | 27篇 |
2012年 | 15篇 |
2011年 | 18篇 |
2010年 | 53篇 |
2009年 | 45篇 |
2008年 | 22篇 |
2007年 | 63篇 |
2006年 | 19篇 |
2005年 | 27篇 |
2004年 | 9篇 |
2003年 | 13篇 |
2002年 | 17篇 |
2001年 | 19篇 |
2000年 | 21篇 |
1999年 | 25篇 |
1998年 | 93篇 |
1997年 | 89篇 |
1996年 | 109篇 |
1995年 | 84篇 |
1994年 | 88篇 |
1993年 | 74篇 |
1992年 | 21篇 |
1991年 | 30篇 |
1990年 | 27篇 |
1989年 | 33篇 |
1988年 | 38篇 |
1987年 | 27篇 |
1986年 | 34篇 |
1985年 | 33篇 |
1984年 | 13篇 |
1983年 | 21篇 |
1982年 | 20篇 |
1981年 | 21篇 |
1980年 | 17篇 |
1979年 | 4篇 |
1978年 | 10篇 |
1977年 | 14篇 |
1976年 | 13篇 |
1975年 | 9篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1966年 | 1篇 |
排序方式: 共有1413条查询结果,搜索用时 31 毫秒
1.
2.
3.
P. E. R. Rhemrev W. A. A. Van Os D. A. Edelman H. H. Badrawi 《Advances in Contraception》1988,4(2):125-130
In a follow-up evaluation of 3721 Multiload IUD users, the removal rate for medical reasons other than bleeding/pain was only 2.6 per 100 women at three years. Most of these removals were for reasons that appeared to be unrelated to IUD use. The removal rate for pelvic inflammatory disease was 0.3 per 100 woman years. Women were followed up for up to three years after removal of their IUDs. Among women with PID at least 70% of those who desired pregnancy subsequently became pregnant, a rate similar to that of women who had their IUDs electively removed to become pregnant. The study provides further data on the safety of intrauterine contraception.
Resumen Durante el seguimiento de 3721 usuarias del DIU Multiload, la tasa de remociones por otras razones médicas que sangrado/dolor, fué de 2.6 por 100 mujeres en tres años. La mayoría de estas remociones fueron hechas por razones que parecen no estar relacionadas con el uso del DIU. La tasa de remociones por enfermedad inflamatoria pelviana fué de 0.3 por 100 años-mujer. Las mujeres tuvieron seguimiento hasta tres años después de la remoción de sus DIU. Entre las mujeres con enfermedad inflamatoria pelviana, al menos 70% de las que desearon un embarazo lo consiguieron; una tasa similar a la de mujeres que eligieron la remoción del DIU para quedar embarazadas. El estudio proporciona más información sobre la inocuidad de la anticoncepción intrauterina.
Résumé Lors d'une évaluation de suivi effectuée sur 3721 utilisatrices de DIU Multiload, le taux de retrait pour des raisons médicales autres que des pertes sanguines/douleurs n'a atteint que 2,6 pour cent des femmes après trois ans. La plupart de ces retraits ont été pratiqués pour des raisons qui ne semblaient pas liées à l'utilisation du DIU. Le taux de retrait pour cause d'inflammation pelvienne s'est élevé à 0,3 pour cent femmes-an. Les femmes ont été suivies pendant des périodes allant jusqu'à trois ans après le retrait du DIU. Parmi les patientes qui avaient contracté une inflammation pelvienne, 70% au moins de celles qui souhaitaient une grossesse sont par la suite devenues enceintes; taux semblable à celui des femmes qui avaient choisi de ne plus porter leur DIU précisément pour avoir un enfant. Cette étude fournit des données supplémentaires sur la sécurité qu'apporte la contraception intrautérine.相似文献
4.
5.
6.
7.
8.
Y Leskinen JP Salenius T Lehtim?ki H Huhtala H Saha 《American journal of kidney diseases》2002,40(3):472-479
BACKGROUND: Knowledge of the prevalence of peripheral arterial disease (PAD) in patients with chronic renal failure (CRF) is limited because of a lack of uniformity in disease definition and recognition. Furthermore, little is known of the prevalence of medial arterial calcification (MAC) in patients with CRF. Our goal is to study the prevalence of PAD and MAC defined by ankle brachial index (ABI) or toe brachial index (TBI) measurements in a Finnish population of patients with CRF consisting of predialysis and dialysis patients, as well as renal transplant recipients. METHODS: We examined 136 patients with CRF and 59 control subjects. Fifty-nine of the patients with CRF had moderate to severe predialysis CRF, 36 patients were on dialysis treatment, and 41 were renal transplant recipients. Mean age of patients was 51.9 +/- 11.5 years, and 39 patients (29%) had diabetes. ABI and TBI were measured by means of photoplethysmography. The definition of PAD required an ABI value of 0.90 or less, a TBI value of 0.60 or less, or a previous positive lower-extremity angiogram result. ABI values of 1.3 or greater or incompressible arteries at ankle level indicated MAC. The presence of claudication was determined by an interview. RESULTS: Prevalences of PAD on this study were 22.0% in patients with predialysis CRF, 30.6% in patients on dialysis treatment, 14.6% in renal transplant recipients, and 1.7% in the control group (P = 0.001). Prevalences of MAC were 23.7%, 41.7%, 23.1%, and 3.4% (P < 0.001), respectively. Only 9 patients had claudication, and 6 of those patients had PAD. CONCLUSION: Both asymptomatic PAD and MAC are common in patients with CRF. Therefore, we recommend the use of both ABI and TBI measurements in the evaluation of PAD in patients with CRF. 相似文献
9.
We used arthrotomography to study the glenoid labrum in 114 patients. Sixty-nine of the patients had anatomic instability of the shoulder (including recurrent dislocation and subluxation of the shoulder), and 45 patients had functional instability of the shoulder (denoted by chronic pain, clicking of the joint, and the sensation that an unstable condition exists without the objective signs of it). Labral tears were revealed arthrotomographically in 86% of the patients with anatomic instability, while only 40% of the patients with functional instability had labral abnormalities, and these were primarily of minor severity. Fifty-six patients (44 of whom had anatomic instability; 12, functional instability) required surgery. The surgical findings were correlated with the arthrotomographic findings, and no false-positive results were revealed. However, arthrotomography demonstrated only part of the pathologic condition of two patients. These results confirm that there is a strong correlation between labral pathologic conditions and anatomic instability of the shoulder. Arthrotomographic studies have a great impact on the selection of therapy in cases of both anatomic and functional instability of the shoulder. 相似文献
10.