全文获取类型
收费全文 | 7083篇 |
免费 | 540篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 72篇 |
儿科学 | 362篇 |
妇产科学 | 158篇 |
基础医学 | 737篇 |
口腔科学 | 125篇 |
临床医学 | 618篇 |
内科学 | 1525篇 |
皮肤病学 | 196篇 |
神经病学 | 364篇 |
特种医学 | 354篇 |
外科学 | 1384篇 |
综合类 | 213篇 |
现状与发展 | 30篇 |
一般理论 | 3篇 |
预防医学 | 305篇 |
眼科学 | 149篇 |
药学 | 531篇 |
中国医学 | 10篇 |
肿瘤学 | 516篇 |
出版年
2023年 | 227篇 |
2022年 | 82篇 |
2021年 | 196篇 |
2020年 | 145篇 |
2019年 | 198篇 |
2018年 | 247篇 |
2017年 | 169篇 |
2016年 | 177篇 |
2015年 | 195篇 |
2014年 | 315篇 |
2013年 | 295篇 |
2012年 | 405篇 |
2011年 | 436篇 |
2010年 | 270篇 |
2009年 | 260篇 |
2008年 | 330篇 |
2007年 | 289篇 |
2006年 | 270篇 |
2005年 | 261篇 |
2004年 | 247篇 |
2003年 | 212篇 |
2002年 | 197篇 |
2001年 | 135篇 |
2000年 | 154篇 |
1999年 | 173篇 |
1998年 | 68篇 |
1997年 | 93篇 |
1996年 | 79篇 |
1995年 | 65篇 |
1994年 | 54篇 |
1993年 | 63篇 |
1992年 | 106篇 |
1991年 | 109篇 |
1990年 | 83篇 |
1989年 | 110篇 |
1988年 | 91篇 |
1987年 | 86篇 |
1986年 | 74篇 |
1985年 | 98篇 |
1984年 | 49篇 |
1983年 | 43篇 |
1982年 | 28篇 |
1981年 | 29篇 |
1979年 | 26篇 |
1976年 | 26篇 |
1975年 | 32篇 |
1974年 | 37篇 |
1973年 | 38篇 |
1972年 | 27篇 |
1968年 | 27篇 |
排序方式: 共有7652条查询结果,搜索用时 46 毫秒
1.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention 下载免费PDF全文
2.
K P Sylvester S R Desai A U Wells D M Hansell M Awogbade S L Thein A Greenough 《The European respiratory journal》2006,28(4):832-838
The aim of this study was to determine whether patients with sickle cell disease (SCD) in steady state had pulmonary abnormalities seen on high-resolution computed tomography (HRCT) and whether any abnormalities correlated with contemporaneously diagnosed lung function abnormalities. A subsidiary question was whether the results of a noninvasive measure of haemolysis (end-tidal carbon monoxide (ETCO) levels) correlated with pulmonary function abnormalities. Thirty three patients with SCD, median (range) age 36 yrs (17-67 yrs) were examined. The degree of lobar volume loss and ground-glass opacification and prominence of central vessels on HRCT were quantitatively assessed. Pulmonary function was assessed by measurements of lung volumes, spirometry, gas transfer and oxygen saturation. ETCO levels were measured using an end-tidal CO monitor. Forced expiratory volume in one second (FEV1), forced vital capacity and total lung capacity significantly correlated with HRCT findings, particularly lobar volume loss. ETCO levels significantly negatively correlated with FEV1, vital capacity measured using a plethysmograph, specific airway conductance and arterial oxygen saturation measured by pulse oxymetry. In conclusion, the present results suggest that high-resolution computed tomography noninvasive assessment of haemolysis might be useful to identify sickle cell disease patients with respiratory function impairment. 相似文献
3.
Sandeep Gohar Devendra Desai Anand Joshi Anita Bhaduri Ramesh Deshpande C Balkrishna Mukesh Chawla Camila Rodrigues V R Joshi 《Indian journal of gastroenterology》2003,22(4):140-142
INTRODUCTION: Autoimmune hepatitis (AIH) is a well-defined entity in the West but there are sparse Indian data on this disease. AIM: To study the clinical profile and response to treatment of Indian patients with AIH. METHODS: This is a part retrospective and part prospective study of 50 patients (median age 48 years, range 11-82; 43 women) seen between 1995 to 2001, diagnosed to have AIH as per the revised scoring system. Clinical and laboratory profile, response to treatment, and complications of treatment were analyzed. RESULTS: AIH accounted for 6% of all patients with liver disease seen during the period. The presenting symptoms were gastrointestinal in 43 and non-gastrointestinal in 7, with median symptom duration of 6 months (range 2 weeks to 40 years). Forty patients (80%) had chronic liver disease. Associated illnesses were present in 28 patients. Twenty-six patients were classified as definite and the rest as probable AIH. Forty-nine patients had Type 1 AIH. Five patients had overlap syndrome. Forty-five patients (90%) received immunosuppressive therapy. Twelve of 18 patients receiving only prednisolone and 21 of 27 patients receiving prednisolone and azathioprine combination responded. Thirteen (26%) patients had therapy-related complications (infectious 5, non infectious 8) with two treatment-related deaths. CONCLUSION: Type 1 AIH was the predominant type of AIH. The majority of patients with AIH presented with chronic liver disease. There was good response to immunosuppressive therapy. Therapy-related complications occurred in one-fourth of patients. 相似文献
4.
S. N. Desai 《Annals of the Royal College of Surgeons of England》1990,72(2):101-103
A method of treatment for cleft lip in children in the first 48 h of life is described and the rationale discussed. My experience over 18 years of the treatment of 300 newborn babies with this deformity is reported. 相似文献
5.
6.
Increased production of peroxidation products associated with cardiac operations. Evidence for free radical generation 总被引:7,自引:0,他引:7
D Royston J S Fleming J B Desai S Westaby K M Taylor 《The Journal of thoracic and cardiovascular surgery》1986,91(5):759-766
We investigated the degree and time course of neutrophil sequestration into human lungs during cardiac operations. At the same time, measurement of the concentration of peroxidation products in the plasma was used as an index of oxidant free radical activity. The study was performed in two groups of patients. Group A (n = 11) had studies extending over the entire operative period and showed a highly significant sequestration of neutrophils into the lung, together with a highly significant (p less than 0.001) rise in peroxidation products from 2.8 +/- 0.12 nmol/ml(mean +/- standard error of the mean)before bypass to a peak of 5.05 +/- 0.13 nmol/ml at the end of bypass. As these changes occurred only during the time after release of the aortic cross-clamp, we investigated this period in more detail in a second group of patients (Group B, n = 7). Results from this group showed that significant release of peroxidation products occurred at the same time as pulmonary neutrophil sequestration. This study has produced evidence of increased oxidant activity in the lung associated with cardiac operations. Nevertheless, it is not known whether the neutrophils sequestered into the lung alone induced the increased activity. Similarly, whether neutrophil-derived oxidant species are the sole cause of lung tissue injury remains unproved. 相似文献
7.
8.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
9.
10.
Creating empowering meaning: an interactive process of promoting health with chronically ill older Canadians 总被引:2,自引:1,他引:1
McWilliam C; Stewart M; Brown J; McNair S; Desai K; Patterson M; Del Maestro N; Pittman B 《Health promotion international》1997,12(2):111-123
Many health promotion approaches afford education about disease prevention
and enhancement of one's health status. But strategies for enabling older
people with chronic illness to better mobilize their resources for everyday
living still require development. This practical action research study
explored the experiences of 13 purposefully selected older persons who
participated in a health promotion intervention premised on the adult
education theory of perspective transformation. Findings illuminate health
promotion through a holistic interactive process in which professional and
chronically ill older person together evolved a caring relationship and
enhanced conscious awareness of life and health experiences. Five
health-promoting strategies were identified: building trust and meaning;
connecting; caring; mutual knowing; and mutual creating. Researchers
suggest several important directions to refine professional practice
approaches and health care delivery systems in order to promote the health
of older persons with chronic conditions. 相似文献