全文获取类型
收费全文 | 7063篇 |
免费 | 541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 | 157篇 |
基础医学 | 737篇 |
口腔科学 | 125篇 |
临床医学 | 618篇 |
内科学 | 1518篇 |
皮肤病学 | 194篇 |
神经病学 | 362篇 |
特种医学 | 353篇 |
外科学 | 1383篇 |
综合类 | 213篇 |
现状与发展 | 30篇 |
一般理论 | 3篇 |
预防医学 | 304篇 |
眼科学 | 148篇 |
药学 | 531篇 |
中国医学 | 10篇 |
肿瘤学 | 513篇 |
出版年
2023年 | 222篇 |
2022年 | 72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7633条查询结果,搜索用时 875 毫秒
21.
22.
R K Desai I Jialal C Naidoo M A Omar S M Joubert 《Suid-Afrikaanse tydskrif vir geneeskunde》1987,71(3):156-157
Twenty-four hour urinary free cortisol and mean and integrated 13h00-16h00 plasma cortisol levels were measured in 9 patients with proven Cushing's syndrome (5 with Cushing's disease, 2 with ectopic adrenocorticotrophic hormone production due to bronchial carcinoma and 2 with adrenal adenomas) and in 21 patients without Cushing's syndrome. The 24-hour urinary free cortisol levels and mean and integrated 13h00-16h00 plasma cortisol estimations clearly distinguished patients with Cushing's syndrome from those without. However, adequate suppression on dexamethasone suppression tests (false negatives) were obtained in 3 of the 9 patients with Cushing's syndrome. Since the integrated 13h00-16h00 plasma cortisol estimation is cheaper and simpler than the mean 13h00-16h00 plasma cortisol estimation, we recommend it as an adjunct in the diagnosis of Cushing's syndrome. 相似文献
23.
V K Nayak N K Desai N A Kshirsagar S D Bhandarkar R S Satoskar 《Journal of postgraduate medicine》1991,37(1):5-8
Pathological conditions are known to affect pharmacokinetics of many drugs. Antipyrine half-life is used as a marker of liver microsomal enzyme function. Antipyrine pharmacokinetics, therefore, was investigated in 23 thyrotoxic and 11 euthyroid goitre patients. Of these, 11 thyrotoxic and 9 euthyroid goitre patients also participated in doxycycline bioavailability studies. In thyrotoxic patients, antipyrine half-life and AUCo infinity and doxycycline Cpmax and AUCo infinity were found to be reduced as compared to those of healthy euthyroid normal subjects. Following treatment of thyrotoxicosis, the antipyrine half-life and AUCo infinity returned to normal. Doxycycline AUCo infinity returned to near normal range but Cpmax did not. 相似文献
24.
Neurophysiological investigation of diabetic impotence. Are sacral response studies of value? 总被引:1,自引:0,他引:1
The role of electrophysiologically elicited sacral responses in the detection of the neurological component of diabetic impotence has been evaluated in a detailed study using properly defined diagnostic criteria. The results prove that these tests are not reliable indicators of neuropathy and their relevance in the routine investigation of diabetic impotence is of questionable value. 相似文献
25.
Solitary bronchioloalveolar carcinoma: CT criteria 总被引:14,自引:0,他引:14
Kuhlman JE; Fishman EK; Kuhajda FP; Meziane MM; Khouri NF; Zerhouni EA; Siegelman SS 《Radiology》1988,167(2):379-382
The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis. 相似文献
26.
K A Dinshaw S C Pande S K Shrivastava M A Gonsalves S H Advani R Gopal S S Shrikhande L J Desouza P Jagannath P B Desai 《Journal of surgical oncology》1992,49(1):39-44
A retrospective analysis of 328 cases of Hodgkin's Disease (HD) subjected to a staging laparotomy at the Tata Memorial Hospital, Bombay, India, from 1974 to 1986 was undertaken to assess its relevance to our setup. Eighty percent of the patients were from clinical stages (CS) I and II, 38% with lymphocyte predominance (LP), and 41% with mixed cellularity (MC) histologies. Staging laparotomy was positive in 60% cases overall, including 50% from CS IA and IIA, 68% from CS IB and IIB, and 53% and 67%, respectively, from LP and MC histologies. Splenic involvement was seen in 54% cases. Operative complications were encountered in 2% of cases and deaths in two cases only. In view of the high propensity for abdominal spread, only selected CS IA and IIA cases would merit a staging laparotomy within which, nearly 50% cases with a negative yield could be offered radical segmental irradiation alone for cure. The majority of our patients would, however, require combination therapy. 相似文献
27.
28.
Four hundred eighty-three epileptic children attending the Pediatric Epilepsy Clinic at Bai Jerbai Wadia Hospital for Children, Bombay, India were classified according to the International League Against Epilepsy (ILAE) classification of epileptic seizures (1981) and epilepsies and epileptic syndromes (1989). The predominant seizures were partial (53.6), generalized (40.3%), and unclassifiable (6%). In epilepsies and epileptic syndromes, 55.3% were partial, 27% were generalized, 13.5% were undetermined, and 4.1% were special syndromes. Although our results were similar in many respects to those of other reported series, some differences were observed in the incidence of partial and generalized seizures, and partial and generalized epileptic syndromes and their subgroups, such as idiopathic, symptomatic, and cryptogenic partial syndromes, idiopathic generalized syndromes, and symptomatic specific syndromes. These differences are probably due to different age limits, methods of case ascertainment and inclusion criteria, different genetic and environmental factors, variable interpretation of clinical and EEG features, and lack of facilities for investigation in developing countries. Despite various limitations, we were able to classify most cases; the ILAE classification can be used in developing countries so that comparison can be made with other studies. 相似文献
29.
30.