全文获取类型
收费全文 | 20216篇 |
免费 | 1372篇 |
国内免费 | 438篇 |
专业分类
耳鼻咽喉 | 188篇 |
儿科学 | 72篇 |
妇产科学 | 1826篇 |
基础医学 | 1302篇 |
口腔科学 | 194篇 |
临床医学 | 1747篇 |
内科学 | 288篇 |
皮肤病学 | 134篇 |
神经病学 | 667篇 |
特种医学 | 1013篇 |
外科学 | 4366篇 |
综合类 | 3685篇 |
现状与发展 | 2篇 |
预防医学 | 1807篇 |
眼科学 | 16篇 |
药学 | 1397篇 |
11篇 | |
中国医学 | 1165篇 |
肿瘤学 | 2146篇 |
出版年
2024年 | 34篇 |
2023年 | 185篇 |
2022年 | 468篇 |
2021年 | 759篇 |
2020年 | 702篇 |
2019年 | 521篇 |
2018年 | 660篇 |
2017年 | 697篇 |
2016年 | 824篇 |
2015年 | 755篇 |
2014年 | 1729篇 |
2013年 | 1532篇 |
2012年 | 1562篇 |
2011年 | 1704篇 |
2010年 | 1450篇 |
2009年 | 1235篇 |
2008年 | 1038篇 |
2007年 | 1072篇 |
2006年 | 869篇 |
2005年 | 703篇 |
2004年 | 583篇 |
2003年 | 483篇 |
2002年 | 336篇 |
2001年 | 318篇 |
2000年 | 273篇 |
1999年 | 228篇 |
1998年 | 173篇 |
1997年 | 142篇 |
1996年 | 116篇 |
1995年 | 134篇 |
1994年 | 90篇 |
1993年 | 107篇 |
1992年 | 71篇 |
1991年 | 67篇 |
1990年 | 42篇 |
1989年 | 43篇 |
1988年 | 39篇 |
1987年 | 40篇 |
1986年 | 25篇 |
1985年 | 43篇 |
1984年 | 47篇 |
1983年 | 16篇 |
1982年 | 21篇 |
1981年 | 16篇 |
1980年 | 11篇 |
1979年 | 20篇 |
1978年 | 12篇 |
1977年 | 9篇 |
1976年 | 11篇 |
1973年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 726 毫秒
71.
目的:探讨宫颈癌的临床、病理特点、诊治方法及预后因素。方法:收集1996年1月至2001年1月226例宫颈癌患者进行回顾性分析。结果:平均患病年龄为48.18岁。130例患者为阴道流血,70例为阴道流液,25例下腹疼痛,l例精神减退、贫血、浮肿。病理分期:Ⅰ期病例数为169例(75%);Ⅱ期病例数为3l例(13.72%);Ⅲ期病例数为23例(10.18%);Ⅳ期病例数为3例(1.1%)。比较2l例宫颈鳞癌与宫颈腺癌的转移,显示后者的腹主动脉旁淋巴结转移、肾上腺转移、子宫转移、胸水形成明显高于前者。结论:重视宫颈癌发病相关因素及临床症状,争取早期诊断,严格手术病理分期,选择适当治疗方案。 相似文献
72.
采用电化学分析方法,在月经周期中连续测定宫颈粘液的电导率,分析电导率变化规律与排卵期的相关性,此法确认的排卵期与实际排卵期一致,由此为自然避孕提供新途径。 相似文献
73.
74.
目的 探索缩血管活性肽类物质在椎动脉型颈椎病发病时的变化情况及病理意义。方法 椎动脉型颈椎病治疗组 30例 ,正常组 30例 ,椎动脉型颈椎病患者均采用中医手法治疗。正常组和治疗组患者分别在治疗前和治疗后空腹取静脉血进行神经肽类物质NPY、ET、CGRP、ANP放射免疫检测。结果 治疗前椎动脉型颈椎病患者的血浆NPY、ET、ANP明显高于正常组 ,而CGRP的含量则低于正常组 (P <0 0 5) ;经过治疗后患者的血浆NPY、ET、ANP含量降低 ,CGRP的含量升高 ,与治疗前比较具有显著性差异 (P <0 0 5)。结论 缩血管活性肽类物质在椎动脉型颈椎病发病时可能起重要的神经 体液调节作用 相似文献
75.
颈椎骨折类型与脊髓损伤关系之临床观察 总被引:2,自引:0,他引:2
通过对92例颈椎骨折病例的分析,发现屈曲型损伤最多见(53%),其次为过伸型(26%),压缩型(21%)。屈曲型和压缩型多见于年轻人,而屈曲损伤导致的脱位及过伸型则多见于年龄较大者。爆裂骨折引起的神经损害最重,其次为屈曲型、过伸型及压缩(非爆裂)骨折。神经功能改善率以爆裂型骨折最差,死亡率亦最高,以压缩(非爆裂型)骨折最好,其次为过伸型及屈曲型。文内对各型的特点进行了详细讨论。 相似文献
76.
We have analysed video recordings of 21 patients with cervical dystonia treated with botulinum toxin. Fourteen patients have a record both of their response shortly after injections were commenced and between four years five months and six years seven months later. Our analysis shows that the long term outcome is often better than the initial response. We suggest that chronic treatment with botulinum toxin allows different muscles to those initially injected to be identified as contributors to the dystonia. Subsequent injection of these muscles leads to further improvement. It implies that cervical dystonia is a more widespread disorder of motor control, rather than simply limited to a few muscles. 相似文献
77.
Keuk Shun Shin M.D. Seum Chung M.D. Hye Kyung Lee M.D. Jae Duk Lew M.D. 《Aesthetic plastic surgery》1996,20(1):69-76
Reduction mammaplasty was performed in 30 patients by combining the central pedicle flap method with the short submammary scar (3-S) technique to avoid the common drawbacks of currently popular dermoglandular procedures. Reduction was accomplished by using perforating vascular branches from the pectoralis major muscle and its fascia supplying the nipple and breast parenchyme instead of the subdermal plexus. The central vascular pedicle supplying the nipple-areola complex was preserved. Only the periphery of the breast parenchyme was resected circumferentially, with the exception of the inferolateral portion, so as not to injure the sensory nerve. The remaining breast parenchyme was preserved in an inverted cone shape. The nipple-areola complex was safely transposed with great freedom, and the amount of resection was accurately adjusted for symmetry. No cases of nipple-areola complex sensory change occurred postoperatively, and lactation is possible because of preservation of the lactiferous ducts. The length of postoperative scars was reduced by using the short submammary scar technique. We believe this combined method is ideal in patients requiring resections ranging from 200 to 600 g per breast with good skin elasticity and moderate degree of ptosis.Presented at the Sixth Asian Pacific Congress of the International Confederation for Plastic and Reconstructive Surgery, in Seoul, Korea, October 1993. 相似文献
78.
Susanne K. Kjaer Claus Dahl Gerda Engholm Johannes E. Bock Elsebeth Lynge Ole M. Jensen 《Cancer causes & control : CCC》1992,3(4):339-348
Sexual, reproductive and venereal risk factors for cervical neoplasia were investigated in a population-based case-control study of 586 women with histologically verified, cervical squamous-cell carcinoma in situ, and 59 women with invasive squamous-cell cervical cancer, diagnosed from 1985 to 1986 in Copenhagen. Cases were identified from the computerized Danish Cancer Registry. An age-stratified control group (n=614) was drawn at random from the female population in the study area by means of the Danish Central Population Register. A structured questionnaire was mailed to cases as well as controls. Increasing number of sexual partners exerted a significant effect on the risk both for carcinoma in situ, and invasive cancer, independently of age at first intercourse and other potential confounders. Conversely, the association with early age at first intercourse became statistically insignificant after allowance for other risk factors, although an increasing risk was still observed with decreasing age at sexual debut. Early age at first episode with genital warts was a significant risk factor for carcinoma in situ, perhaps indicating a possible increased susceptibility of the cervix epithelium during adolescence. A history of genital warts was a good predictor of risk for carcinoma in situ, whereas a history of previous gonorrhea was associated with an increased risk for invasive carcinoma. Women with multiple births had a significantly increased adjusted risk, especially for carcinoma in situ, although some association was also observed with invasive cervical cancer. The study supports the hypothesis of cervical neoplasia being a sexually transmitted disease, and that carcinoma in situ and invasive cervical carcinoma, to a high degree, have similar patterns of risk factors.Drs Kjaer, Engholm, and Lynge are with the Danish Cancer Registry. Dr Dahl is with the Department of Surgery, Slagelse Hospital, Denmark. Dr Bock is with the Department of Gynecology, Rigshospitalet, Copenhagen, Denmark. Dr Jensen, formerly with the Danish Cancer Registry, is deceased. Address correspondence to Dr Kjaer, Danish Cancer Registry, Institute of Cancer Epidemiology, Danish Cancer Society, Rosenvengets Hovedvej 35, Box 839, Copenhagen. Denmark. The Danish Cancer Society supported this study through grants. 相似文献
79.
80.