全文获取类型
收费全文 | 4010602篇 |
免费 | 290915篇 |
国内免费 | 9036篇 |
专业分类
耳鼻咽喉 | 55846篇 |
儿科学 | 131634篇 |
妇产科学 | 110585篇 |
基础医学 | 573330篇 |
口腔科学 | 111985篇 |
临床医学 | 369714篇 |
内科学 | 774450篇 |
皮肤病学 | 92892篇 |
神经病学 | 325597篇 |
特种医学 | 152058篇 |
外国民族医学 | 1141篇 |
外科学 | 600403篇 |
综合类 | 83605篇 |
现状与发展 | 15篇 |
一般理论 | 1602篇 |
预防医学 | 314169篇 |
眼科学 | 93571篇 |
药学 | 296059篇 |
15篇 | |
中国医学 | 7855篇 |
肿瘤学 | 214027篇 |
出版年
2019年 | 32262篇 |
2018年 | 44615篇 |
2017年 | 33821篇 |
2016年 | 38888篇 |
2015年 | 43798篇 |
2014年 | 61174篇 |
2013年 | 92658篇 |
2012年 | 124853篇 |
2011年 | 132579篇 |
2010年 | 79744篇 |
2009年 | 75842篇 |
2008年 | 124109篇 |
2007年 | 131941篇 |
2006年 | 133872篇 |
2005年 | 129190篇 |
2004年 | 124307篇 |
2003年 | 119813篇 |
2002年 | 115875篇 |
2001年 | 183119篇 |
2000年 | 187965篇 |
1999年 | 158924篇 |
1998年 | 47190篇 |
1997年 | 41476篇 |
1996年 | 41628篇 |
1995年 | 40013篇 |
1994年 | 36751篇 |
1993年 | 34576篇 |
1992年 | 124634篇 |
1991年 | 120815篇 |
1990年 | 117507篇 |
1989年 | 113896篇 |
1988年 | 104813篇 |
1987年 | 102721篇 |
1986年 | 96715篇 |
1985年 | 92692篇 |
1984年 | 69296篇 |
1983年 | 59000篇 |
1982年 | 35177篇 |
1981年 | 31677篇 |
1979年 | 62889篇 |
1978年 | 44720篇 |
1977年 | 37761篇 |
1976年 | 35545篇 |
1975年 | 37965篇 |
1974年 | 45282篇 |
1973年 | 43145篇 |
1972年 | 40606篇 |
1971年 | 38140篇 |
1970年 | 35117篇 |
1969年 | 33798篇 |
排序方式: 共有10000条查询结果,搜索用时 437 毫秒
891.
T. Kapellen A. Galler K. Claus S. Heger D. Härtig Prof. Dr. W. Kiess 《Der Diabetologe》2006,2(2):167-181
Type 1 diabetes is one of the commonest chronic disorders encountered in children and adolescents. When it first becomes apparent in children, approximately 20% of them have clinical and biochemical signs of ketoacidosis (DKA). In the presence of unusual clinical symptoms it is necessary to consider the possibility of associated conditions, such as coeliac disease, immunothyroiditis and Addison’s disease. Children with diabetes must be treated by a multidisciplinary team made up of paediatrician, paediatric diabetes specialist, psychologist, social worker, ophthalmologist, dietitian, nurse and diabetes counsellor, making it essential for them to be treated in regional specialised centres. They are treated in their own psychosocial environment and their families are involved in the therapy. Comprehensive, multidisciplinary treatment strategies have now made it possible for these patients to enjoy normal physical wellbeing and near-normal psychosocial development. Prevention and early treatment of of disturbances associated with diabetes remain an important concern. The fact that type 2 diabetes must now be looked for in overweight children and adolescents is a new aspect of diabetes medicine. 相似文献
892.
According to the current nutritional recommendations issued by professional diabetes and nutrition associations, diabetic patients should keep to a diet consisting of 45–60% carbohydrates, 10–20% protein, and not more than 35% fat. However, not all of these nutritional recommendations are evidence based. For example, current studies show that the intake of insoluble roughage may be underrepresented. It is also possible that diabetic patients could benefit from keeping to the lower end of the recommended range for carbohydrates (45%) and the upper end of the range advised for protein (20%). 相似文献
893.
Heather M Arthur Christine Patterson James A Stone 《European journal of cardiovascular prevention and rehabilitation》2006,13(1):3-9
BACKGROUND: Presently, complementary and alternative medicine, including both therapies and herbal/oral supplements, is used globally. Few studies have examined the use of specific therapies, separate from herbal/oral supplements, in cardiac rehabilitation. This paper presents a systematic evaluation of current research evidence related to use of specific complementary and alternative medicine therapies in secondary prevention of cardiovascular disease, with a view to making recommendations for cardiac rehabilitation. DESIGN AND METHODS: A literature search was conducted using complementary and alternative medicine websites, Medline, Allied and Complementary Medicine, CINAHL, Cochrane databases, EMBASE, SportDiscus, Clinical Evidence, and Evidence-Based Practice to locate research-based scientific evidence related to the use of complementary and alternative medicine in cardiac rehabilitation. Search keywords included heart, cardiac, cardiovascular, coronary, myocardial and rehabilitation, combined with particular therapies. Herbal/oral supplements were not included in this evaluation. RESULTS: Some complementary and alternative medicine therapies may be useful to patients by themselves or coupled with traditional cardiac rehabilitation. Tai chi, as a complement to existing exercise interventions, can be utilized for low and intermediate risk patients. transcendental meditation may be used as a stress reduction technique. There was insufficient evidence found for the use of acupuncture or chelation therapy in cardiac rehabilitation or secondary prevention. CONCLUSIONS: Some complementary and alternative medicine therapies hold promise for patients in cardiac rehabilitation. Further research is essential, however, in all areas of complementary and alternative medicine to confirm its usefulness as an adjunct to cardiac rehabilitation. 相似文献
894.
I. DILEK N. TOPCU C. DEMIR A. BAY K. UZUN A. GUL A. FAIK
NER S. UGRAS 《International journal of laboratory hematology》2006,28(3):170-176
The incidence of hematological malignancies during pregnancy is low, and treatment in this setting is problematic. This study observed 21 pregnancies in 18 patients with hematological malignancies. Patients’ ages were between 19 and 43 (median 25) years. Two pregnancies ended with spontaneous abortion, one pregnancy ended with in utero death, three therapeutic abortions were carried out, and 15 infants were born alive but three of them died later. The median birth weight was 2.47 kg. Twelve babies survived to a median age of 36 (range 4–117) months. Eight babies were exposed to chemotherapy during the in utero period. One baby was exposed to chemotherapy during all the trimesters and was born prematurely and later died because of intracranial bleeding. Four babies were exposed to chemotherapy during the first trimester, one of them had low birth weight and floating thumb malformation, two of them had only low birth weight, and one was born healthy, but died at 3 months of age as a result of severe gastroenteritis. Two babies were exposed to chemotherapy during the second and third trimesters; one of them had low birth weight, and the other pregnancy ended in in utero death. One infant was exposed to chemotherapy during the third trimester and was born at term, but died because of pulmonary hemorrhage. We concluded that chemotherapy during all trimesters of pregnancy carries a significant risk for an unfavorable outcome. 相似文献
895.
A. Zampieron M. Elseviers P. Ormandy H. Vlaminck J.‐Y. De Vos T. Kafkia E. Lindley M. Harrington 《Journal of Renal Care》2006,32(1):14-19
This paper describes a study to capture the key roles and activities of nephrology nurses across different countries in Europe. The concept of the study and the need to clarify the activities of the nephrology nurse arose as part of a larger study to develop the European Practice Database (EPD) (1). The Research Board (EDTNA/ERCA) needed to identify key questions that would detect significant differences in the role and responsibilities of nephrology nurses in different countries and monitor the evolution over time of nephrology nursing practice in Europe. It was therefore appropriate to devise a separate small study to generate evidence based questions for the EPD and confirm the reliability and usefulness of the information captured. 相似文献
896.
897.
Dr. med. Dr. Univ. Rom A. Zeyfang 《Der Diabetologe》2006,2(3):262-274
Zusammenfassung In Deutschland leiden 25% der über 70-Jährigen unter einem Diabetes mellitus. Biologisch ältere, multimorbide und in ihren Funktionen beeinträchtigte geriatrische Patienten benötigen spezielle Vorgehensweisen bei Zielplanung, Allgemeinmaßnahmen und Pharmakotherapie. Auf der Basis der vorhandenen Leitlinien werden gesicherte Erkenntnisse dargestellt und Empfehlungen zu den Besonderheiten der Therapie des geriatrischen Diabetespatienten gegeben. Besonderes Augenmerk liegt dabei auf der Interaktion von geriatrischen Syndromen und Diabetes sowie der Verbesserung der Lebensqualität. 相似文献
898.
N. SUVAJD
I V. EMERIKI‐MARTINOVI . ARANOVI M. PETROVI M. POPOVI V. ARTIKO M. UPI I. ELEZOVI 《International journal of laboratory hematology》2006,28(5):317-320
We report the case of a littoral‐cell angioma of the spleen, a recently described benign vascular tumour, whose imaging and pathological characteristics have been discussed only by a few authors. The diagnosis was made after elective splenectomy. The CT images, scintigraphy and histological specimens are presented, and differential diagnoses discussed. 相似文献
899.
900.
Gary E. Stapleton Benjamin W. Eidem Ricardo H. Pignatelli Karina M. Carlson Charles E. Mullins Ronald G. Grifka 《Congenital heart disease》2006,1(3):116-119
Background. A persistent patent ductus arteriosus (PDA) may delay closure of a coexisting atrial septal defect (ASD) due to volume loading and enlargement of the left atrium. The purpose of this study was to investigate the natural history of ASD size in patients with a PDA following transcatheter PDA occlusion. Methods. All patients with an ASD and a PDA who underwent transcatheter PDA occlusion at Texas Children’s Hospital were identified. Patients with ASD diameter <3 mm, or additional cardiac defects were excluded. Eight patients (7 females) with small‐ to moderate‐sized ASDs and a PDA were identified. Patient demographics, echocardiographic data, and cardiac catheterization data were recorded. Data were analyzed by 1‐tailed t‐test. Results. Following PDA occlusion, ASD diameter decreased in 6 of 8 patients by a mean of 3.8 mm (±2.3 mm), including 2 that closed. The median duration of follow‐up was 689 days. One ASD remained unchanged and 1 increased in size. The mean maximum ASD diameter decreased from 6.4 mm (±2.2 mm) to 3.9 mm (±3.4 mm) (P = .03). Two patients underwent subsequent transcatheter ASD occlusion. Conclusion. Following transcatheter PDA occlusion, small‐ to moderate‐sized ASDs have significant probability to decrease in size, and possibly close. In infants and children, we recommend transcatheter PDA occlusion, and serial follow‐up of the size of the ASD. This will allow many small‐ to moderate‐sized ASDs to either close, or become smaller, obviating the need for future intervention. 相似文献