全文获取类型
收费全文 | 3702篇 |
免费 | 260篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 54篇 |
儿科学 | 192篇 |
妇产科学 | 48篇 |
基础医学 | 443篇 |
口腔科学 | 95篇 |
临床医学 | 328篇 |
内科学 | 683篇 |
皮肤病学 | 37篇 |
神经病学 | 273篇 |
特种医学 | 309篇 |
外科学 | 671篇 |
综合类 | 54篇 |
一般理论 | 5篇 |
预防医学 | 245篇 |
眼科学 | 67篇 |
药学 | 158篇 |
中国医学 | 1篇 |
肿瘤学 | 313篇 |
出版年
2021年 | 44篇 |
2020年 | 27篇 |
2019年 | 45篇 |
2018年 | 40篇 |
2016年 | 34篇 |
2015年 | 48篇 |
2014年 | 64篇 |
2013年 | 110篇 |
2012年 | 130篇 |
2011年 | 144篇 |
2010年 | 101篇 |
2009年 | 81篇 |
2008年 | 132篇 |
2007年 | 147篇 |
2006年 | 119篇 |
2005年 | 133篇 |
2004年 | 131篇 |
2003年 | 127篇 |
2002年 | 120篇 |
2001年 | 104篇 |
2000年 | 146篇 |
1999年 | 91篇 |
1998年 | 69篇 |
1997年 | 63篇 |
1996年 | 55篇 |
1995年 | 48篇 |
1994年 | 45篇 |
1993年 | 33篇 |
1992年 | 97篇 |
1991年 | 93篇 |
1990年 | 81篇 |
1989年 | 108篇 |
1988年 | 99篇 |
1987年 | 98篇 |
1986年 | 91篇 |
1985年 | 100篇 |
1984年 | 56篇 |
1983年 | 66篇 |
1982年 | 34篇 |
1981年 | 29篇 |
1980年 | 41篇 |
1979年 | 56篇 |
1978年 | 38篇 |
1977年 | 60篇 |
1976年 | 37篇 |
1975年 | 47篇 |
1974年 | 43篇 |
1973年 | 32篇 |
1972年 | 35篇 |
1970年 | 26篇 |
排序方式: 共有3976条查询结果,搜索用时 31 毫秒
11.
The case of a health careers program evaluation illustrates some aspects of evaluating very small and rapidly evolving programs. Such programs can change quickly, since there is no massive bureaucracy to restrain them. Rigid evaluation research methods would frustrate both researchers and program staff. The authors suggest that flexible design, use of specialized interviewing and analytical experiments--in this case, telephone surveys testing program response--and a recognition that a consultative relationship exists will result in outcomes useful to the program and rich in evaluation data. 相似文献
12.
M C Meyers J G Wilkinson J R Elledge H Tolson J C Sterling J R Coast 《The American journal of sports medicine》1992,20(4):410-415
In this study we examined the physical, hematologic, and exercise response of 20 male and 10 female athletes of the National Intercollegiate Rodeo Association, Central Rocky Mountain Region. Male subjects were grouped by roughstock, steer wrestling, and roping events. Female athletes were grouped separately. Maximal aerobic capacity, pulmonary ventilation, respiratory exchange ratio, energy expenditure, maximal heart rate, blood pressure, treadmill time, pre- and postexercise lactate, percent body fat, lean body mass, blood chemistry, serum lipids, and reaction/movement time were analyzed by event. No significant differences (P greater than 0.05) were found in any of these categories between male events. Mean resting blood chemistry parameters of rodeo athletes were within normal ranges. Steer wrestling athletes possessed greater body size and lean body mass than other groups. When analyzing body composition, blood pressure, and total cholesterol:high-density lipoprotein (HDL) cholesterol ratios, results indicate average to low risk for coronary heart disease. When compared to other intermittent-activity sport athletes, college rodeo athletes appear to have similar aerobic capacities, but possess lower lean body mass and greater percent body fat. 相似文献
13.
This study examined the use of autologous fat as an alternative to Teflon® and collagen as the implantable material in vocal cord medialization. Five animals underwent left recurrent laryngeal nerve sections with subsequent fat harvest and implantation into the left true vocal cords. Three animals were killed after 48 hours and 2 after 3 weeks; their larynges were examined with light microscopy. The results of the 48-hour samples show moderate acute inflammation and few areas of focal necrosis. The 3-week samples show no necrotic foci, minimal foreign-body reaction, and maintenance of structure and volume of the injected fat. Autologous fat may prove to be a valuable alternative to nonautologous injectable material in vocal cord augmentation. 相似文献
14.
Hon Y. Chan Frederick J. Meyers Jerry P. Lewis 《Cancer chemotherapy and pharmacology》1987,20(3):265-266
Summary In a study of 11 adult patients with acute nonlymphocytic leukemia (ANLL), infusion therapy with high-dose VP-16 and intermediate-dose cytosine arabinoside was administered. Response was assessed with reference to bone marrow aspirations performed on days 1; 12, 13, or 14; and 21 of treatment. All 7 of the patients with ANLL in relapse achieved marrow hypoplasia, and 3 of them achieved complete response. LFTs were elevated in most patients but no evidence of hepatocellular necrosis was observed. It is concluded that the value of VP-16 in ANLL may have been underestimated in the past because of inadequate dosing.Abbreviations ANLL
acute nonlymphocytic leukemia
- CGL
chronic granulocytic leukemia
- DNR
daunorubicin
- VNC
vincristine
- ID
Ara-C, intermediate-dose Ara-C (500 mg/m2 for 12 doses)
- HD
Ara-C, high-dose Ara-C (3 g/m2 for 12 doses)
- SGGT
serum glutamic transaminase
- LDH
lactic dehydrogenase
- SGOT
serum glutamic oxaloacetic transaminase 相似文献
15.
16.
17.
A 3-year-old boy, who developed the signs and symptoms characteristic of Kawasaki disease, is described. The child also had an 8 cm tender hepatomegaly. Hydrops of the gallbladder could not be shown. Liver biopsy showed marked infiltration of inflammatory cells, including neutrophil and eosinophil leucocytes in the portal tracts involving the periphery of the portal arteries and veins, and acute inflammation of the bile ducts with neutrophil and eosinophil infiltration of the walls. Overt cholangitis has been described only once before in Kawasaki disease, when a viral agent was suggested as being important in the pathogenesis. Although the clinical and laboratory findings in cases of Kawasaki disease clearly suggest an acute infection--as they did in this case--no aetiological agent has yet been incriminated. The possibility of a drug-induced auto-allergic or hypersensitivity state is considered. Evidence for such a state includes a history of drug administration, pathological findings similar to peri-arteritis nodosa--a condition often associated with a hypersensitivity state--the presence of eosinophils in the lesions and a response to treatment with aspirin, a drug known to ameliorate hypersensitivity states. 相似文献
18.
M C Meyers R D Calvo J C Sterling D W Edelstein 《Medicine and science in sports and exercise》1992,24(12):1311-1315
Fractures of the epiphyseal plate are considered rare when compared with the more prevalent injuries found in competitive sports, but the complications associated with this type of trauma are a major concern. The factors affecting the success or failure of healing include the severity of injury, patient age, and the type and expedience of treatment. This case study examines the clinical presentation and treatment of a 15-yr-old high school football player who sustained a displaced, distal femoral epiphyseal Salter II fracture. Primary treatment consisted of nonmanipulative, nonweight bearing knee immobilization. The treatment resulted in malunion, pain, decreased range of motion and physical deformity; therefore, the patient sought a second opinion. On physical exam, the displacement and rotational deformity of the fracture site were unacceptable. The fracture was treated 20 days post-injury via open reduction with internal fixation. On follow-up, the athlete demonstrated radiographic healing, normal physical exam, and no significant leg length discrepancy or deformity. The athlete successfully returned to full competitive sport activity. 相似文献
19.
R Daifuku K Haenftling J Young E S Groves C Turrell F J Meyers 《Antimicrobial agents and chemotherapy》1992,36(10):2349-2351
Monoclonal antibody MAB-T88 is a human monoclonal immunoglobulin M antibody directed at the lipopolysaccharide of gram-negative bacteria. In this study, nine patients who were expected to become neutropenic from antineoplastic chemotherapy received an infusion of MAB-T88, three patients at each of three doses: 1, 4, and 8 mg/kg of body weight. MAB-T88 was shown to be safe, with an effective half-life in plasma of 25.4 h, and no patient developed immunoglobulin G antibody to MAB-T88. 相似文献
20.
C Daniel Meyers Moti L Kashyap 《Endocrinology & Metabolism Clinics of North America》2004,33(3):557-75, vii
Nicotinic acid effectively treats each of the common lipid abnormalities found in the metabolic syndrome, and much progress has recently been made in understanding its mechanisms of action.Early concern that nicotinic acid can precipitate or worsen diabetes has been eased with recent trials, which demonstrated its safety and effectiveness in insulin-resistant states. Furthermore, nicotinic acid prevents cardiovascular disease and death in persons with a high prevalence of risk factors for the metabolic syndrome. When used by an experienced physician and taken by a motivated patient, nicotinic acid can be safe and effective in treating the dyslipidemia of the metabolic syndrome. 相似文献