全文获取类型
收费全文 | 16715篇 |
免费 | 1917篇 |
国内免费 | 263篇 |
专业分类
耳鼻咽喉 | 52篇 |
儿科学 | 38篇 |
妇产科学 | 227篇 |
基础医学 | 1043篇 |
口腔科学 | 64篇 |
临床医学 | 1163篇 |
内科学 | 585篇 |
皮肤病学 | 49篇 |
神经病学 | 115篇 |
特种医学 | 1315篇 |
外国民族医学 | 16篇 |
外科学 | 3906篇 |
综合类 | 1457篇 |
现状与发展 | 3篇 |
预防医学 | 317篇 |
眼科学 | 15篇 |
药学 | 551篇 |
21篇 | |
中国医学 | 97篇 |
肿瘤学 | 7861篇 |
出版年
2024年 | 64篇 |
2023年 | 631篇 |
2022年 | 1266篇 |
2021年 | 1406篇 |
2020年 | 1298篇 |
2019年 | 745篇 |
2018年 | 920篇 |
2017年 | 728篇 |
2016年 | 652篇 |
2015年 | 816篇 |
2014年 | 1453篇 |
2013年 | 1283篇 |
2012年 | 1146篇 |
2011年 | 1056篇 |
2010年 | 999篇 |
2009年 | 785篇 |
2008年 | 509篇 |
2007年 | 487篇 |
2006年 | 434篇 |
2005年 | 333篇 |
2004年 | 278篇 |
2003年 | 245篇 |
2002年 | 227篇 |
2001年 | 227篇 |
2000年 | 157篇 |
1999年 | 132篇 |
1998年 | 91篇 |
1997年 | 64篇 |
1996年 | 62篇 |
1995年 | 52篇 |
1994年 | 27篇 |
1993年 | 25篇 |
1992年 | 40篇 |
1991年 | 32篇 |
1990年 | 25篇 |
1989年 | 34篇 |
1988年 | 25篇 |
1987年 | 25篇 |
1986年 | 20篇 |
1985年 | 15篇 |
1984年 | 17篇 |
1983年 | 12篇 |
1982年 | 17篇 |
1981年 | 12篇 |
1980年 | 9篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1977年 | 3篇 |
1973年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
改良"箭头"皮瓣法乳头乳晕再造术 总被引:2,自引:0,他引:2
目的 介绍改良"箭头"皮瓣法乳头乳晕再造术的应用经验.方法 将"箭头"皮瓣法乳头乳晕再造术的设计经过凋整改进,为曾使用自体组织行乳房再造的患者再造乳头乳晕12例,其中2例采用改良"箭头"皮瓣法+薄中厚皮片移植乳头乳晕再造,4例采用改良"箭头"皮瓣法+自体肋软骨埋置+乳晕文身的乳头乳晕再造,6例采用"箭头"皮瓣法+乳晕文身的乳头乳晕再造.结果 再造乳头全部成活,其中2例术后1个月时再造乳头回缩完全变平,其余10例术后3个月时再造乳头回缩率约50%,跟踪随访6个月至1年,再造乳头大小稳定,与对侧基本对称.结论 本手术方法设计合理、操作简单,且无需另选供区,远期乳头突度维持也良好. 相似文献
94.
目的:探讨PCR检测大鼠外周血及腹水中细菌DNA对空肠-空肠、回肠-回肠吻合口瘘的早期诊断价值。方法:健康Wistar雌性大鼠50只,随机分成5组,每组10只:A组为假手术组;B组为空肠-空肠吻合组;C组为空肠吻合口瘘组;D组为回肠-回肠吻合组;E组为回肠吻合口瘘组。采集手术前后外周血及术后腹水,抽提DNA, 比较lacZ基因和16SrRNA基因的PCR阳性率,并观察各组的病理学情况。结果:(1)C,E组术后外周血lacZ基因PCR阳性率与B,D组无显著性差异(P>0.05);C,E组术后外周血16SrRNA基因PCR阳性率显著高于B,D组(P<0.05)。(2)C,E组腹水lacZ基因和16SrRNA基因PCR阳性率均显著高于B,D组(P<0.05)。(3)C,E组腹水lacZ基因阳性率显著高于外周血(P<0.05);C,E组腹水16SrRNA基因阳性率与外周血无显著性差异(P>0.05)。结论:(1)PCR检测术后外周血16SrRNA基因对空、回肠吻合口瘘的早期诊断有一定意义;(2)检测术后腹水lacZ基因和16SrRNA基因对空肠-空肠、回肠-回肠吻合口瘘的早期诊断也有一定意义。 相似文献
95.
96.
97.
Susan Miesfeldt Christine Hayden Netta Apedoe Sharon Jerome Andrea Fletcher 《Journal of community health》2010,35(2):109-114
Over 800 Maine residents will be diagnosed with colorectal cancer (CRC) this year, and nearly 300 will die from the disease.
While CRC screening can reduce these rates, it is only among insured populations that screening rates exceed 50%. This project
aimed to reduce barriers to, and increase rates of CRC screening among underinsured and uninsured women, ages 50 years and
over, residing in Cumberland County, Maine. The existing network of the Maine Breast and Cervical Health Program (MBCHP) was
used to reach the target population. A packet containing (1) an offer for no-cost fecal occult blood test (FOBT) screening
and CRC-related educational materials, and (2) a stamped, addressed postcard specifying the woman’s interest in these resources,
was mailed to 300 MBCHP enrollees residing in Cumberland County. Women requesting screening were contacted by phone to further
determine eligibility. Ninety-three women (31%) requested FOBT kits and 29 of these women requested educational materials.
Ten women were ineligible for screening because of previous colonoscopy. Fifty-two completed FOBT kits (63%) were returned;
all were negative. An additional 42 (14%) women requested educational materials only. To reduce the burden of CRC in Maine
and nationally, disparate populations must be reached with efficient and effective screening services. Established networks
are proven means for reaching uninsured and underinsured individuals with education, screening services, and necessary follow-up
care. This project serves as a model for the future development of similar programs statewide and nationally. 相似文献
98.
1 文献类型
治疗。
2 证据水平
1b。 相似文献
99.
N. J. Carty C. Carter C. Rubin D. Ravichandran G. T. Royle I. Taylor 《Annals of the Royal College of Surgeons of England》1995,77(2):127-130
Fibroadenoma is a common cause of discrete breast lumps in young women. There is agreement that fibroadenomas can be diagnosed preoperatively with a high degree of confidence and that some of the lesions thus diagnosed will resolve, possibly obviating the need for excision. There is, however, wide disagreement over the proportion of fibroadenomas that resolve spontaneously and therefore the benefit that accrues from an expectant policy. The aim of this study was to audit the management of fibroadenomas on one unit and clarify their natural history over a 5-year period. A cohort of 70 women with 87 fibroadenomas diagnosed using a triple assessment of clinical examination, cytology and imaging (sonomammography) have been followed for a minimum of 5 years. In all, 53 of the 'fibroadenomas' have been excised. In four cases the histology revealed benign disease other than fibroadenoma; there were no neoplasms. The sensitivity of cytology and sonomammography for the diagnosis of fibroadenoma were 84% and 98% respectively. Thirty-four fibroadenomas have not been excised. Of 25 fibroadenomas that have been reassessed after at least 5 years of follow-up, 13 (52%) have reduced in size, 4 (16%) are unchanged in size and 8 (32%) have grown. No patient has developed a carcinoma at the site of the presumed fibroadenoma. This study confirms that an expectant management policy of fibroadenomas has not resulted in misdiagnosis of carcinomas. Further, since a significant proportion of fibroadenomas remain static or reduce in size over a 5-year period many women can avoid excision. 相似文献
100.