全文获取类型
收费全文 | 14121篇 |
免费 | 760篇 |
国内免费 | 45篇 |
专业分类
耳鼻咽喉 | 169篇 |
儿科学 | 402篇 |
妇产科学 | 382篇 |
基础医学 | 1720篇 |
口腔科学 | 296篇 |
临床医学 | 904篇 |
内科学 | 3760篇 |
皮肤病学 | 449篇 |
神经病学 | 1088篇 |
特种医学 | 228篇 |
外科学 | 1873篇 |
综合类 | 126篇 |
一般理论 | 4篇 |
预防医学 | 1504篇 |
眼科学 | 264篇 |
药学 | 878篇 |
中国医学 | 76篇 |
肿瘤学 | 803篇 |
出版年
2023年 | 90篇 |
2022年 | 74篇 |
2021年 | 311篇 |
2020年 | 179篇 |
2019年 | 393篇 |
2018年 | 567篇 |
2017年 | 305篇 |
2016年 | 316篇 |
2015年 | 308篇 |
2014年 | 399篇 |
2013年 | 605篇 |
2012年 | 935篇 |
2011年 | 1041篇 |
2010年 | 598篇 |
2009年 | 395篇 |
2008年 | 906篇 |
2007年 | 899篇 |
2006年 | 947篇 |
2005年 | 890篇 |
2004年 | 798篇 |
2003年 | 766篇 |
2002年 | 694篇 |
2001年 | 383篇 |
2000年 | 454篇 |
1999年 | 336篇 |
1998年 | 76篇 |
1997年 | 65篇 |
1996年 | 46篇 |
1995年 | 39篇 |
1994年 | 41篇 |
1993年 | 46篇 |
1992年 | 117篇 |
1991年 | 106篇 |
1990年 | 103篇 |
1989年 | 73篇 |
1988年 | 62篇 |
1987年 | 61篇 |
1986年 | 69篇 |
1985年 | 52篇 |
1984年 | 34篇 |
1983年 | 35篇 |
1982年 | 24篇 |
1981年 | 20篇 |
1980年 | 26篇 |
1979年 | 19篇 |
1978年 | 26篇 |
1974年 | 16篇 |
1973年 | 21篇 |
1971年 | 20篇 |
1969年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
32.
J Suárez de Lezo A Medina M Pan E Hernández M Sancho A Bethencourt M Romero F Melián J Segura F Jiménez 《Revista espa?ola de cardiología》1991,44(2):106-114
We study 40 patients, 55 +/- 7 years old with acute myocardial infarction treated early by thrombolytic therapy (20 STK and 20 rt-PA). All patients were angiographically studied in the following conditions: 1) baseline, before initiating therapy. 2) Three hours after treatment. 3) Twenty four hours later. 4) Before discharge. The infarct related artery was patent 24 hours after treatment in 31 patients (78%); five of them were patent before treatment, and we observed an early reperfusion in 20 patients (57%) and late reperfusion in 6 patients (17%). The number of patients with angiographic evidence of intraluminal thrombus decreased progressively through conditions while the grade TIMI of coronary perfusion increased in the absence of reocclusion. Final regional wall motion of infarct related myocardial zones and their degree of recovery were significantly higher in recanalized patients, as compared with non-reperfused patients. Similarly, left ventricular functional recovery was higher in patients with antegrade of collateral flow to the infarct area, as compared with totally occluded patients. 相似文献
33.
34.
35.
36.
J. Hernández Quero M.D. Ph.D. N. Ortego Centeno M.D. R. Castillo Amaro M.D. J. M. Higuera Torres-Puchol M.D. Ph. D. 《Infection》1991,19(6):440-441
Summary Pyomyositis is an acute bacterial infection of striated muscle. It is common in the tropics, but rarely reported in temperate climates. We present two cases in patients with the acquired immune deficiency syndrome (AIDS), one an active homosexual, and one an intravenous drug user. A brief review of the clinical findings and diagnostic procedures is included. We conclude that pyomyositis should be included in the list of locations of pyogenic infections that can occur in AIDS patients.
Spontane Pyomyositis und AIDS: ein seltenes Zusammentreffen
Zusammenfassung Die Pyomyositis ist eine akute bakterielle Infektion der quergestreiften Muskulatur. Im Gegensatz zu den Tropen, wo sie häufig auftritt, wird die Pyomyositis in gemäßigten Klimazonen nur selten beobachtet. Wir stellen zwei Patienten mit Pyomyositis und AIDS vor: der eine Patient ist Homosexueller, der andere intravenös drogenabhängig. Klinische Befunde und diagnostisches Vorgehen werden kurz dargestellt. Nach unserer Meinung sollte die Pyomyositis in die Liste pyogener Infektionslokalisationen bei AIDS-Patienten eingereiht werden.相似文献
37.
38.
M. V. Hernández P. Peris N. Guañabens L. Alvarez A. Monegal F. Pons A. Ponce J. Muñoz-Gómez 《Calcified tissue international》1997,61(1):48-51
Moderate increases in ``classical' biochemical markers of bone turnover have been described only in some patients with Camurati–Engelmann
disease. However, the determination of the following ``new' markers has not been previously performed: serum osteocalcin
(BGP), bone alkaline phosphatase (BAP), carboxyterminal propeptide of type I procollagen (PICP), aminoterminal propeptide
of type I procollagen (PINP), tartrate-resistant acid phosphatase (TRAP), telopeptide carboxyterminal of type I collagen (ICTP),
urinary pyridinoline (PYR), crosslinked N-telopeptides of type I collagen (NTX), and Crosslaps (CL). Such a determination
may improve the evaluation of the disease activity. To evaluate the usefulness of biochemical markers of bone turnover reflecting
Camurati–Engelmann disease activity we measured the levels of all these markers in four affected patients. The results were
compared with bone scintigraphic indices of disease activity. Except for PICP and TRAP, bone formation and resorption markers
were abnormal in all patients and were related to bone scan indices of disease activity. Among the markers of bone formation
PINP, BAP, and BGP showed the highest values, whereas NTX and CL were the most sensitive markers of bone resorption. These
results suggest that the determination of NTX or CL, and PINP or either BAP and BGP, associated with bone scan evaluation,
provides the best assessment of Camurati–Engelmann disease activity.
Received: 14 June 1996 / Accepted: 31 December 1996 相似文献
39.
n-Hexane neuropathy was studied in 20 workers exposed for prolonged periods to this solvent, and with urinary 2, 5-hexanedione concentrations exceeding the biological exposure index recommended by the American Conference of Governmental Industrial Hygienists (5 mg/L) with a mean of 11.02 mg/L (range 5.3—24.2 mg/L). Although neurological examination did not detect significant anomalies in any of the patients, and the conduction velocity and F waves of all the nerves tested were normal, neurographic studies revealed significant differences in the amplitude of sensory nerve action potentials (SNAP) recorded from the sural (mean 14.0 μV), median (mean 17.3 μV), and ulnar (mean 7.9 μV) nerves when compared with normal values from healthy adults of the same age range, examined under identical conditions. The amplitude of the SNAP in sural and median nerves correlated significantly with the number of years worked. The notable decrease in mean amplitude of the SNAP appeared to reflect the primary neurotoxic effects of 2,5-hexanedione. © 1994 John Wiley & Sons, Inc. 相似文献
40.