全文获取类型
收费全文 | 1497篇 |
免费 | 108篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 62篇 |
妇产科学 | 43篇 |
基础医学 | 149篇 |
口腔科学 | 39篇 |
临床医学 | 117篇 |
内科学 | 378篇 |
皮肤病学 | 28篇 |
神经病学 | 81篇 |
特种医学 | 34篇 |
外科学 | 204篇 |
综合类 | 63篇 |
一般理论 | 5篇 |
预防医学 | 206篇 |
眼科学 | 41篇 |
药学 | 71篇 |
中国医学 | 2篇 |
肿瘤学 | 65篇 |
出版年
2023年 | 13篇 |
2022年 | 11篇 |
2021年 | 33篇 |
2020年 | 19篇 |
2019年 | 26篇 |
2018年 | 22篇 |
2017年 | 28篇 |
2016年 | 24篇 |
2015年 | 40篇 |
2014年 | 30篇 |
2013年 | 24篇 |
2012年 | 76篇 |
2011年 | 70篇 |
2010年 | 58篇 |
2009年 | 40篇 |
2008年 | 56篇 |
2007年 | 53篇 |
2006年 | 58篇 |
2005年 | 55篇 |
2004年 | 60篇 |
2003年 | 43篇 |
2002年 | 50篇 |
2001年 | 51篇 |
2000年 | 45篇 |
1999年 | 49篇 |
1998年 | 14篇 |
1996年 | 12篇 |
1995年 | 15篇 |
1992年 | 41篇 |
1991年 | 34篇 |
1990年 | 27篇 |
1989年 | 26篇 |
1988年 | 22篇 |
1987年 | 23篇 |
1986年 | 17篇 |
1985年 | 13篇 |
1984年 | 19篇 |
1983年 | 14篇 |
1981年 | 11篇 |
1980年 | 11篇 |
1979年 | 14篇 |
1977年 | 15篇 |
1974年 | 18篇 |
1973年 | 11篇 |
1972年 | 13篇 |
1971年 | 17篇 |
1969年 | 12篇 |
1968年 | 14篇 |
1967年 | 10篇 |
1966年 | 10篇 |
排序方式: 共有1606条查询结果,搜索用时 46 毫秒
1.
2.
Circulating immune complexes in pre-eclampsia. 总被引:3,自引:0,他引:3
Serum samples from 20 non-pregnant women, 30 women with normal pregnancy and 50 women with pregnancy associated with pre-eclampsia were tested for circulating immune complexes using the polyethyleneglycol precipitation method. A highly significant positive correlation was found between circulating immune complexes and severe pre-eclampsia (BP greater than 140/90 mm Hg, albuminuria greater than 0.25 g/l). In contrast to this the difference in immune complex levels between non-pregnant subject, normal pregnancy cases and patients with mild pre-eclampsia was not statistically significant. A significant positive correlation was found between the level of circulating immune complexes and the severity of albuminuria. These findings suggest that circulating immune complexes, though not seeming to play an aetiological role in pre-eclampsia may very well be involved in its pathogenesis. 相似文献
3.
F. Jolly 《European archives of psychiatry and clinical neuroscience》1900,33(3):1020-1047
Ohne Zusammenfassung 相似文献
5.
6.
7.
J R Smith C Wells M Jolly P Shah M Savage P Reginald V S Kitchen 《Sexually transmitted infections》1993,69(4):295-296
OBJECTIVE--It was hypothesised that the endometrium might act as a reservoir for candida, thus infecting the vagina as the endometrium is shed during menstruation. DESIGN--A prospective study of women with recurrent vulvo-vaginal candidiasis. The endometrium was sampled and cultured for candida species. SETTING--Central London STD clinic. SUBJECTS--26 women were enrolled, of whom 20 completed the study. RESULTS--One patient had a positive endometrial culture for candida species, the isolate being Candida krusei. CONCLUSIONS--The endometrium is not a common resevoir for candida species and therefore, infection at this site is an unlikely cause of recurrent vaginal candidiasis. 相似文献
8.
9.
P K Rohatgi 《Respiration; international review of thoracic diseases》1988,54(3):201-205
A patient with sarcoidosis with elevated 1,25-dihydroxy vitamin D levels, hypercalcemia, nephrolithiasis, and moderate azotemia is presented because of development of metastatic pulmonary calcification which was diagnosed by radioisotope scanning and tissue biopsy. 相似文献
10.
Abstract: Background : Despite extensive literature on the topic, it is uncertain if grand (para ≥ 5) and great grand (para ≥ 10) multiparity are associated with adverse birth outcomes. We critically evaluate the evidence for and against the existence of adverse maternal and/or fetal outcomes in high parity women. Methods : An electronic search of MEDLINE and other bibliographic databases (Current Contents, EMBASE, and CAB) was conducted, and all relevant articles in English language were retrieved. Results : Findings on the association between high parity and maternal‐fetal birth outcomes are not consistent. Although the older literature tends to suggest that multiparity is a risk factor for negative birth outcomes, more recent reports are not supportive. Comparison across studies was further complicated by confounding factors like maternal age, socioeconomic status, and levels of prenatal care, as well as by variations in study designs and in the definition of parity itself. Furthermore, most studies that examined women of extreme parity (para ≥ 10) were handicapped by inadequate power. Conclusions : After accounting for quality, culture, and degrees of associations, the preponderance of evidence seems to point to possible existence of heightened risk for certain medical complications and placental pathologies among women of extreme parity. The literature also provides reasonable evidence for a higher‐than‐expected likelihood for occurrence of fetal macrosomia with advanced parity. 相似文献