全文获取类型
收费全文 | 2295221篇 |
免费 | 171616篇 |
国内免费 | 7667篇 |
专业分类
耳鼻咽喉 | 30324篇 |
儿科学 | 68747篇 |
妇产科学 | 59865篇 |
基础医学 | 319011篇 |
口腔科学 | 65166篇 |
临床医学 | 202888篇 |
内科学 | 466016篇 |
皮肤病学 | 52878篇 |
神经病学 | 186446篇 |
特种医学 | 90685篇 |
外国民族医学 | 438篇 |
外科学 | 358645篇 |
综合类 | 47087篇 |
现状与发展 | 3篇 |
一般理论 | 682篇 |
预防医学 | 175324篇 |
眼科学 | 49775篇 |
药学 | 167885篇 |
8篇 | |
中国医学 | 4606篇 |
肿瘤学 | 128025篇 |
出版年
2018年 | 26704篇 |
2017年 | 20194篇 |
2016年 | 22892篇 |
2015年 | 25785篇 |
2014年 | 34116篇 |
2013年 | 51473篇 |
2012年 | 69331篇 |
2011年 | 72924篇 |
2010年 | 43075篇 |
2009年 | 40374篇 |
2008年 | 68062篇 |
2007年 | 72386篇 |
2006年 | 72953篇 |
2005年 | 70702篇 |
2004年 | 67476篇 |
2003年 | 64961篇 |
2002年 | 62263篇 |
2001年 | 113179篇 |
2000年 | 116820篇 |
1999年 | 97821篇 |
1998年 | 26265篇 |
1997年 | 23198篇 |
1996年 | 24122篇 |
1995年 | 23627篇 |
1994年 | 21964篇 |
1993年 | 20448篇 |
1992年 | 77698篇 |
1991年 | 75059篇 |
1990年 | 72421篇 |
1989年 | 69626篇 |
1988年 | 64276篇 |
1987年 | 62784篇 |
1986年 | 59044篇 |
1985年 | 56783篇 |
1984年 | 42106篇 |
1983年 | 35609篇 |
1982年 | 20722篇 |
1981年 | 18316篇 |
1979年 | 37696篇 |
1978年 | 26522篇 |
1977年 | 22595篇 |
1976年 | 20299篇 |
1975年 | 21681篇 |
1974年 | 25800篇 |
1973年 | 24604篇 |
1972年 | 23061篇 |
1971年 | 21524篇 |
1970年 | 19959篇 |
1969年 | 18769篇 |
1968年 | 17280篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
L González-Bayón S González-Moreno G Ortega-Pérez 《European journal of surgical oncology》2006,32(6):619-624
The new treatment strategy for Peritoneal Surface Malignancy combines a cytoreductive surgery and perioperative intraperitoneal chemotherapy. Cytoreduction removes all macroscopic tumor. Intraperitoneal chemotherapy avoids implantation of microscopic residual tumor cells on intra-abdominal surfaces when it is administered intraoperatively and/or early in the postoperative period. Delivering cytotoxic drugs directly into the peritoneal cavity maximizes dose intensity and minimizes systemic toxicity. Hyperthermia is selectively cytotoxic for malignant cells and potentiates the effect of chemotherapy. Implementation of this procedure makes the perioperative personnel to face a risk of exposure to cytotoxic agents. Furthermore, peritonectomies and electro-evaporation of tumor nodules are performed with high voltage electrocautery, generating a large amount of surgical smoke during several hours. Inhalation of these fumes may be also a risk for healthcare workers. In this article, we analyse in depth these new risks of the operating room personnel, we review the literature, and we give guidelines for secure performance of cytoreductive surgery and hyperthermic intraoperative intraperitoneal chemotherapy, as well as for early postoperative intraperitoneal chemotherapy administration. These new procedures are safe techniques for patients and healthcare workers provided adequate policies are adopted to avoid occupational exposure. 相似文献
92.
93.
94.
R E Dales A Mehdizadeh S D Aaron K L Vandemheen J Clinch 《The European respiratory journal》2006,28(2):319-322
The aim of the present study was to explore differences in the clinical expression, clinical diagnoses and management of airway diseases in a primary-care setting. Patients aged >or=35 yrs who had ever smoked were enrolled when they presented for any reason to one of eight rural primary-care practices. Respiratory symptom questionnaires and spirometry were administered. In total, 1,034 patients had acceptable and reproducible spirometry, of whom 550 (53%) were males and 484 (47%) were females. Males smoked more than females (41.2 versus 29.2 pack-yrs) respectively, and were more likely to have a pre-bronchodilator forced expiratory volume in one second/forced vital capacity <0.70 at 22.4 versus 11.8%, respectively. However, more females than males reported breathlessness (51.0 versus 42.8%, respectively), a prior diagnosis compatible with airflow obstruction and taking respiratory medications (23.4 versus 14.9%, respectively). In conclusion, the current results suggest that females are more likely than males to report breathlessness and be prescribed respiratory medications independent of differences in the severity of airflow obstruction. 相似文献
95.
96.
97.
T. Svara M. Gombac M. Vrecl P. Juntes R. Kostanjsek A. Pogacnik M. Pogacnik 《Transboundary and Emerging Diseases》2006,53(1):26-29
Clinicopathological and electron microscopical findings of eight cases of enzootic nasal adenocarcinoma of sheep, diagnosed solely in one big flock in Slovenia between years 2001 and 2003 are described. All affected sheep were female, their mean age was 4.5 ± 1.5 years and they either belonged to the Istrian pramenka breed (five sheep) or were crossbreeds (three sheep). Tumours that arose from the ethmoid area of the nasal cavity were unilateral in six cases (75%) and bilateral in two cases (25%). All tumours were classified as adenocarcinomas by histopathological examination and they displayed either a combination of tubular and papillary growth or less often solely tubular proliferation. No metastases were detected in regional lymph nodes, brain or other organs. Electron microscopical studies performed on the reprocessed paraffin‐embedded tissues revealed the presence of the virus‐like particles with an average diameter between 70 and 90 nm. 相似文献
98.
99.
100.
For many parents stopping life-sustaining medical treatment on their dying infant is psychologically impossible. Dostoevsky's insights into human behavior, particularly the fact that individuals do not want the anxiety and guilt associated with responsibility for making difficult decisions, might change the way physicians approach parents for permission to withdraw life-prolonging medical interventions on dying infants. 相似文献