全文获取类型
收费全文 | 25046篇 |
免费 | 1400篇 |
国内免费 | 111篇 |
专业分类
耳鼻咽喉 | 417篇 |
儿科学 | 631篇 |
妇产科学 | 523篇 |
基础医学 | 3648篇 |
口腔科学 | 1889篇 |
临床医学 | 1930篇 |
内科学 | 5209篇 |
皮肤病学 | 555篇 |
神经病学 | 1855篇 |
特种医学 | 579篇 |
外科学 | 2845篇 |
综合类 | 104篇 |
现状与发展 | 1篇 |
一般理论 | 8篇 |
预防医学 | 2812篇 |
眼科学 | 421篇 |
药学 | 1817篇 |
中国医学 | 225篇 |
肿瘤学 | 1088篇 |
出版年
2023年 | 254篇 |
2022年 | 544篇 |
2021年 | 1002篇 |
2020年 | 621篇 |
2019年 | 819篇 |
2018年 | 985篇 |
2017年 | 689篇 |
2016年 | 746篇 |
2015年 | 848篇 |
2014年 | 1122篇 |
2013年 | 1359篇 |
2012年 | 1935篇 |
2011年 | 2168篇 |
2010年 | 1135篇 |
2009年 | 920篇 |
2008年 | 1518篇 |
2007年 | 1457篇 |
2006年 | 1263篇 |
2005年 | 1140篇 |
2004年 | 1009篇 |
2003年 | 877篇 |
2002年 | 734篇 |
2001年 | 469篇 |
2000年 | 410篇 |
1999年 | 362篇 |
1998年 | 148篇 |
1997年 | 116篇 |
1996年 | 94篇 |
1995年 | 63篇 |
1994年 | 73篇 |
1993年 | 52篇 |
1992年 | 167篇 |
1991年 | 149篇 |
1990年 | 106篇 |
1989年 | 123篇 |
1988年 | 108篇 |
1987年 | 89篇 |
1986年 | 98篇 |
1985年 | 88篇 |
1984年 | 66篇 |
1983年 | 62篇 |
1982年 | 35篇 |
1981年 | 38篇 |
1980年 | 35篇 |
1979年 | 58篇 |
1978年 | 30篇 |
1976年 | 36篇 |
1974年 | 30篇 |
1971年 | 35篇 |
1969年 | 34篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Moises Rodriguez-Gonzalez Antonio Moruno Tirado Reza Hosseinpour Jose Santos de Soto 《Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital》2015,42(4):350-356
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital condition. It responds well to early diagnosis and treatment, but otherwise the prognosis is poor. We present our case series of 12 patients (mean age, 2 ± 2.58 yr; age range, 2 mo–8 yr), emphasizing the diagnostic process and discussing our surgical results. The diagnosis of ALCAPA should be suspected in infants who have dilated cardiomyopathy with electrocardiographic changes that suggest ischemia, and in older children who have isolated mitral regurgitation. When clinical suspicion is high, the results of 2-dimensional echocardiography combined with color-flow Doppler studies in expert hands can establish the diagnosis, thus avoiding angiography in critically ill infants. The treatment of choice in our patients was transfer and reimplantation of the left coronary artery onto the ascending aorta. There were 2 deaths: both were infants in extremis who underwent emergency surgery. An older child with severe ventricular dysfunction was given mechanical ventricular assistance and then heart transplantation. As of this report, all 10 survivors remained well and asymptomatic. 相似文献
2.
3.
4.
Shinichiro Uchiyama Takao Hoshino Leila Sissani Monteiro Tavares Linsay Kenji Kamiyama Taizen Nakase Kazuo Kitagawa Kazuo Minematsu Kenichi Todo Yasushi Okada Jyoji Nakagawara Ken Nagata Hiroshi Yamagami Takenori Yamaguchi Pierre Amarenco 《Journal of stroke and cerebrovascular diseases》2019,28(8):2232-2241
BackgroundTIAregistry.org is an international cohort of patients with transient ischemic attack (TIA) or minor stroke within 7 days before enrollment in the registry. Main analyses of 1-year follow-up data have been reported.5 We conducted subanalysis on the baseline and 1-year follow-up data of Japanese patients.MethodsThe patients were classified into 2 groups based on Japanese ethnicity, Japanese (345) and non-Japanese (3238), and their baseline data and 1-year event rates were compared. We also determined risk factors and predictors of 1-year stroke.ResultsCurrent smoking, regular alcohol drinking, intracranial arterial stenosis, and small vessel occlusion; and hypertension, dyslipidemia, coronary artery disease, and extracranial arterial stenosis were more and less common among Japanese patients, respectively. Stroke risk was higher and TIA risk was lower at 1-year follow-up among Japanese patients. The baseline risk factors for recurrent stroke were diabetes, alcohol drinking, and large artery atherosclerosis. Independent predictors of 1-year stroke risk were prior congestive heart failure and alcohol consumption.ConclusionsThe two populations of patients featured differences in risk factors, stroke subtypes, and outcome events. Predictors of recurrent stroke among Japanese patients included congestive heart failure and regular alcohol drinking. Strategies to attenuate residual risk of stroke aside from adherence to current guidelines should take our Japanese-patient specific findings into account. 相似文献
5.
P E Santos E Piontelli Y R Shea M L Galluzzo S M Holland M E Zelazko S D Rosenzweig 《Medical mycology》2006,44(8):749-753
Infections due to Penicillium species other than P.marneffei are rare. We identified a boy with X-linked chronic granulomatous disease (X-CGD) with a pulmonary nodule and adjacent rib osteomyelitis caused by Penicillium piceum. The only sign of infection was an elevated sedimentation rate. P. piceum was isolated by fine needle aspirate and from excised infected tissues. Surgical removal and one year of voriconazole treatment were very well tolerated and led to complete recovery. Microbiological, microscopic and molecular studies support the fungal diagnosis. P. piceum should be considered as a relevant pathogen in immunocompromised patients. 相似文献
6.
7.
Adriana B Campaner Alessandro Scapinelli Ruy O Machado Roberto E Dos Santos Geni W Beznos Tsutomu Aoki 《Gynecological endocrinology》2006,22(7):395-398
We report a case of a prepubertal girl with juvenile primary hypothyroidism presenting as ovarian cysts and precocious puberty. The 7-year-old female was referred to our clinic because of a pelvic/abdominal mass and vaginal bleeding. Besides these findings, on physical examination we noticed the thyroid gland globally increased and the presence of secondary sexual characteristics. Based upon the clinical profile and investigations, the patient was diagnosed with juvenile primary hypothyroidism due to autoimmune thyroiditis. The cysts and precocious puberty resolved spontaneously after the simple replacement of thyroid hormone. It is important to bear in mind hypothyroidism in cases of girls presenting ovarian cysts and precocious puberty in order to avoid unnecessary surgery on the ovaries. 相似文献
8.
9.
Afterpotential characteristics and firing patterns in maturing rat hippocampal CA1 neurones in in vitro slices. 总被引:2,自引:0,他引:2
The postnatal evolution of depolarizing after-potentials (DAPs) and after-hyperpolarizations (AHPs) was studied in rat CA1 hippocampal neurones (5-68 days of age) using in vitro slices. Results were pooled into 4 age groups: P5-9, P10-16, P17-24 and P26-68. In P5-9 cells, DAPs were seen as passive signals, with a time constant similar to the time constant of the membrane. The evolution of the DAP was characterized by a decrease in amplitude, an increase in duration and a change in contour. In P10-16 and P17-24 cells, the DAPs often had a plateau or a hump-like shape which increased the probability of firing and the occurrence of spike doublets. The firing pattern and bursting behaviour of P10-16 CA1 neurones differed from the pattern typical of the adult. P5-9 and P10-16 cells had post-burst AHPs with a smaller amplitude and a more prolonged early phase than at late stages of development. 相似文献
10.
Amy Paul-Ward Gary Kielhofner Brent Braveman Mara Levin 《The American journal of occupational therapy》2005,59(5):540-545
The purpose of this study was to identify perceived barriers to independent community living and employment among clients and staff members in a transitional living facility for persons with AIDS. This qualitative study used focus groups to collect these perceptions from staff members (N = 21) and clients (N = 16). Whereas staff identified both systemic and personal barriers, clients only identified systemic barriers. These findings suggest that both clients and staff recognize the types of environmental barriers to participation that have been identified by disability scholars. The findings also underscore a consequential gap between clients' exclusive emphasis on environmental barriers and staff emphasis on clients' personal barriers that impact upon participation. 相似文献