首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   261篇
  免费   23篇
  国内免费   1篇
儿科学   15篇
妇产科学   5篇
基础医学   18篇
口腔科学   5篇
临床医学   53篇
内科学   78篇
皮肤病学   4篇
神经病学   14篇
特种医学   23篇
外科学   19篇
综合类   6篇
预防医学   29篇
眼科学   1篇
药学   8篇
肿瘤学   7篇
  2021年   2篇
  2018年   3篇
  2017年   2篇
  2016年   4篇
  2015年   8篇
  2013年   3篇
  2012年   4篇
  2011年   5篇
  2010年   6篇
  2009年   11篇
  2008年   11篇
  2007年   6篇
  2006年   8篇
  2005年   4篇
  2004年   2篇
  2003年   3篇
  2001年   3篇
  2000年   4篇
  1999年   10篇
  1998年   12篇
  1997年   9篇
  1996年   13篇
  1995年   8篇
  1994年   16篇
  1993年   10篇
  1991年   2篇
  1989年   5篇
  1988年   11篇
  1987年   6篇
  1986年   5篇
  1985年   10篇
  1984年   5篇
  1983年   8篇
  1982年   6篇
  1981年   7篇
  1980年   5篇
  1977年   2篇
  1976年   6篇
  1975年   2篇
  1973年   2篇
  1972年   2篇
  1971年   5篇
  1969年   2篇
  1965年   3篇
  1963年   4篇
  1962年   2篇
  1956年   2篇
  1939年   1篇
  1938年   1篇
  1927年   1篇
排序方式: 共有285条查询结果,搜索用时 15 毫秒
251.
朱以芳  杨恩德  韦亚娟  赵娟  徐小芬 《医学争鸣》2005,26(21):2013-2013
0 引言气管肿瘤因其病变位置重要,后期病变发展迅速,导致机体气体交换极其困难,患者常有频死的感觉. 故手术难度大,术后并发症多,而倍受重视. 现将其围手术期护理的要点和体会报道如下.  相似文献   
252.
253.
254.
The use of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) following autologous marrow transplantation for lymphoid malignancies was explored in a phase I/II dose escalation study. rhGM-CSF given as a 2-hour infusion daily for 14 days was well tolerated at doses up to 240 micrograms/m2/day. When compared with 86 disease-matched and treatment-matched historical controls, patients receiving greater than or equal to 60 micrograms/m2/day rhGM-CSF recovered neutrophil and platelet counts more rapidly, had fewer days with fever, and were discharged from the hospital sooner.  相似文献   
255.
256.
A 54 year old white man with hypertension, obesity and an elevated serum cholesterol level volunteered for a physical training program. During the sixth week he became ill, and a repeated work-capacity test revealed physiologic evidences of myocardial insufficiency. The pre-exercise serum glutamic oxaloacetic transaminase level was elevated. A routine electrocardiogram four hours later revealed evidence of an acute inferoseptal myocardial infarction.

The course of the disease was uneventful and uncomplicated. Two months after infarction the patient resumed a physical activity program which provided for a slow increase in metabolic demands compatible with his capacity. Repeated work-capacity tests 20 and 23 weeks after infarction showed that he responded to training in exactly the same manner as has been observed in normal, healthy individuals. At that time he was normotensive, with a normal serum cholesterol concentration and near-normal body weight. The capacity for adequate cardiorespiratory adjustments to high metabolic demands was rated as “good.” This study illustrates how performance tests can be used in evaluating the work capacity and progress of a cardiac patient.  相似文献   

257.
Radionuclide esophageal scintigraphy (RES) and manometry were used for prospective evaluation of esophageal involvement and disease severity in 11 patients (nine women and two men; median time since diagnosis, 1 year) with progressive systemic sclerosis (PSS). Quantitation of RES included calculation of the percentage of emptying at 30 seconds, while manometry provided measurements of proximal, distal, and lower esophageal sphincter (LES) pressures. The findings of both RES and manometry were abnormal in all 11 patients. There was a high correlation between the percentage of emptying and either distal esophageal pressure (r = .86, P less than .01) or LES pressure (r = .79, P less than .01). No significant correlation was found between the percentage of emptying and proximal esophageal pressure (r = .28, P = .39). RES is a safe, simple procedure that is readily accepted by patients and can be used in place of manometry for the detection and staging of esophageal involvement in PSS.  相似文献   
258.
259.
Pulmonary Toxicity of Cytostatic Drugs: Cell Kinetics. WITSCHI,H., GODFREY, G., FROME, E., and LINDENSCHMIDT, R. C. (1987).Fundam. Appl. Toxicol. 8, 253–262. Mice were treated withthree cytostatic drugs: cyclophosphamide, busulfan, or l,3-bis(2-chloroethyl)-l-nitro-sourea(BCNU). The alveolar labeling index was measured following drugadministration with a pulse of 3H-labeled thymidine and autoradiography.In cyclophosphamide-treated animals, peak alveolar cell proliferationwas seen 5 days after injection of the drug. In animals treatedwith busulfan or BCNU, proliferation was even more delayed (occurring2–3 weeks after administration). In contrast, with oleicacid, the highest alveolar cell labeling was found 2 days afterintravenous administration. In animals exposed to a cytostaticdrug, proliferation of type II alveolar cells was never a prominentfeature whereas in animals treated with oleic acid there wasan initial burst of type II cell proliferation. It is concludedthat the patterns of pulmonary repair vary between chemicalsdesigned to interfere with DNA replication as compared to agentswhich produce acute lung damage such as oleic acid.  相似文献   
260.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号