全文获取类型
收费全文 | 35122篇 |
免费 | 2042篇 |
国内免费 | 289篇 |
专业分类
耳鼻咽喉 | 455篇 |
儿科学 | 665篇 |
妇产科学 | 520篇 |
基础医学 | 4261篇 |
口腔科学 | 1691篇 |
临床医学 | 2841篇 |
内科学 | 9277篇 |
皮肤病学 | 406篇 |
神经病学 | 3685篇 |
特种医学 | 1357篇 |
外科学 | 5558篇 |
综合类 | 97篇 |
一般理论 | 7篇 |
预防医学 | 1482篇 |
眼科学 | 559篇 |
药学 | 1884篇 |
中国医学 | 73篇 |
肿瘤学 | 2635篇 |
出版年
2024年 | 32篇 |
2023年 | 370篇 |
2022年 | 692篇 |
2021年 | 1288篇 |
2020年 | 770篇 |
2019年 | 1051篇 |
2018年 | 1236篇 |
2017年 | 993篇 |
2016年 | 1110篇 |
2015年 | 1183篇 |
2014年 | 1508篇 |
2013年 | 1854篇 |
2012年 | 2869篇 |
2011年 | 2773篇 |
2010年 | 1575篇 |
2009年 | 1424篇 |
2008年 | 2239篇 |
2007年 | 2324篇 |
2006年 | 2127篇 |
2005年 | 1924篇 |
2004年 | 1708篇 |
2003年 | 1568篇 |
2002年 | 1368篇 |
2001年 | 334篇 |
2000年 | 300篇 |
1999年 | 294篇 |
1998年 | 256篇 |
1997年 | 219篇 |
1996年 | 161篇 |
1995年 | 157篇 |
1994年 | 140篇 |
1993年 | 114篇 |
1992年 | 155篇 |
1991年 | 142篇 |
1990年 | 113篇 |
1989年 | 85篇 |
1988年 | 112篇 |
1987年 | 96篇 |
1986年 | 74篇 |
1985年 | 89篇 |
1984年 | 66篇 |
1983年 | 55篇 |
1982年 | 50篇 |
1981年 | 33篇 |
1980年 | 33篇 |
1979年 | 60篇 |
1978年 | 45篇 |
1977年 | 29篇 |
1973年 | 35篇 |
1972年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Morales Marco U. Saker Saker Wilde Craig Rubinstein Martin Limoli Paolo Amoaku Winfried M. 《International ophthalmology》2020,40(2):305-312
International Ophthalmology - Fixation stability (FS) of the preferred retinal locus (PRL) may be improved by biofeedback fixation training (BFT) with microperimetry. Such training can be done on... 相似文献
992.
Incidence and prognosis of intraabdominal hypertension in a mixed population of critically ill patients: a multiple-center epidemiological study 总被引:1,自引:0,他引:1
Malbrain ML Chiumello D Pelosi P Bihari D Innes R Ranieri VM Del Turco M Wilmer A Brienza N Malcangi V Cohen J Japiassu A De Keulenaer BL Daelemans R Jacquet L Laterre PF Frank G de Souza P Cesana B Gattinoni L 《Critical care medicine》2005,33(2):315-322
OBJECTIVE: Intraabdominal hypertension is associated with significant morbidity and mortality in surgical and trauma patients. The aim of this study was to assess, in a mixed population of critically ill patients, whether intraabdominal pressure at admission was an independent predictor for mortality and to evaluate the effects of intraabdominal hypertension on organ functions. DESIGN: Multiple-center, prospective epidemiologic study. SETTING: Fourteen intensive care units in six countries. PATIENTS: A total of 265 consecutive patients admitted for >24 hrs during the 4-wk study period. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Intraabdominal pressure was measured twice daily via the bladder. Data recorded on admission were the patient demographics with Simplified Acute Physiology Score II, Acute Physiology and Chronic Health Evaluation II score, and type of admission; during intensive care stay, Sepsis-Related Organ Failure Assessment score and intraabdominal pressure were measured daily together with fluid balance. Nonsurvivors had a significantly higher mean intraabdominal pressure on admission than survivors: 11.4 +/- 4.8 vs. 9.5 +/- 4.8 mm Hg. Independent predictors for mortality were age (odds ratio, 1.04; 95% confidence interval, 1.01-1.06; p = .003), Acute Physiology and Chronic Health Evaluation II score (odds ratio, 1.1; 95% confidence interval, 1.05-1.15; p < .0001), type of intensive care unit admission (odds ratio, 2.5 medical vs. surgical; 95% confidence interval, 1.24-5.16; p = .01), and the presence of liver dysfunction (odds ratio, 2.5; 95% confidence interval, 1.06-5.8; p = .04). The occurrence of intraabdominal hypertension during the intensive care unit stay was also an independent predictor of mortality (relative risk, 1.85; 95% confidence interval, 1.12-3.06; p = .01). Patients with intraabdominal hypertension at admission had significantly higher Sepsis-Related Organ Failure Assessment scores during the intensive care unit stay than patients without intraabdominal hypertension. CONCLUSIONS: Intraabdominal hypertension on admission was associated with severe organ dysfunction during the intensive care unit stay. The mean intraabdominal pressure on admission was not an independent risk factor for mortality; however, the occurrence of intraabdominal hypertension during the intensive care unit stay was an independent outcome predictor. 相似文献
993.
Francisco Menor M.D. Hector Cortina Alfredo Marco Ramón Olague 《Abdominal imaging》1992,17(1):339-343
A total of 158 consecutive therapeutic air enemas were performed upon 133 patients during a 2-year period. Perforation and/or an impairment of the general condition of the children were the only main contraindications for the reduction attempt (five patients). Successful reductions were achieved in 89% of cases with no complications. Operation was performed in all 17 cases of unsuccessful reduction: resection in four cases, easy manual reduction in nine, difficult manual reduction in two, and spontaneous reduction in two. There were 16 (12%) patients with one or more recurrent episodes. In 23 (16%) cases, following pneumatic reduction, a swollen ileocecal valve showing a multiple appearance was observed. This fact sometimes results in a differential diagnosis with incomplete reduction; in all these cases, small bowel aeration was always a sign of complete reduction. No significant difference was noted between a swollen ileocecal valve and patient age, duration of symptoms, presence of small bowel obstruction, and further recurrences. Air enema has improved our previous success obtained with hydrostatic reduction (79%), as well as being a simpler, cleaner, and faster technique for intussusception reduction in children. 相似文献
994.
Paolo Marchettini Claudio Marangoni Marco Lacerenza Fabio Formaglio 《European Journal of Pain》2003,7(4):359-364
Neuropathic pain is caused by injury of the peripheral or central nervous system. The neurological examination of the sensory system in neuropathic pain patients guides the anatomical localization of the injury. Among the sensory modalities to be tested, priority should be given to those subserved by small peripheral sensory fibers or by the spinothalamic tract that most commonly are abnormal in neuropathic pain patients. Testing of cold and warm perception was traditionally carried out in the clinic using tubes filled with water at different temperatures, a cumbersome method that has limited the routine examination of these sensory modalities. The Lindblom roller offers a practical and effective method of readily testing temperature perception and is among the best available clinical tools for delineating the anatomical boundaries of a sensory abnormality. Routinely use of the Lindblom roller shall be standard bedside clinical assessment of neuropathic pain patients. To exemplify this statement we describe two patients affected by complex and fluctuating painful sensory abnormalities caused by an extradural mass compressing the spinal cord. The level of the injury was readily localized with a roller kept at room temperature. 相似文献
995.
Donato Casella Daniele Fusario Dario Cassetti Simone Miccoli Anna Lisa Pesce Andrea Bernini Marco Marcasciano Federico Lo Torto Alessandro Neri 《The breast journal》2020,26(8):1589-1592
COVID‐19 has been declared a pandemic by the World Health Organization. As of April 1, 2020, Italy was the country with the second highest number of cases in the world. The spread of COVID‐19 has required a rapid reorganization of health service delivery in face of the pandemic. Breast cancer units have reprioritized their workload to guarantee the health of oncologic patients at the highest risk and regular screening activities. However, at the end of the pandemic emergency, many benign and reconstructive cases will return to our attention and their surgical treatment will be necessary as soon as possible. 相似文献
996.
Marco Bandini Maarten Albersen Juan Chipollini Filippo Pederzoli Yao Zhu Ding-Wei Ye Antonio A. Ornellas Nick Watkin Michael Ager Oliver W. Hakenberg Axel Heidenreich Daniele Raggi Mario Catanzaro Friederike Haidl Elio Mazzone Laura Marandino Alberto Briganti Francesco Montorsi Mounsif Azizi Philippe E. Spiess Andrea Necchi 《BJU international》2020,125(6):867-875
997.
Marco Vito Marino Mauro Podda Marcos Gomez Ruiz Carmen Cagigas Fernandez Domenico Guarrasi Manuel Gomez Fleitas 《Journal of robotic surgery》2020,14(3):493-502
Robotic-assisted pancreaticoduodenectomy (RPD) is progressively gaining momentum. It seems to provide some potential advantages over open approach. Unfortu 相似文献
998.
Luigi Angelo Vaira Claire Hopkins Giovanni Salzano Marzia Petrocelli Andrea Melis Marco Cucurullo Mario Ferrari Laura Gagliardini Carlotta Pipolo Giovanna Deiana Vito Fiore Andrea De Vito Nicola Turra Sara Canu Angelantonio Maglio Antonello Serra Francesco Bussu Giordano Madeddu Sergio Babudieri Alessandro Giuseppe Fois Pietro Pirina Francesco A. Salzano Pierluigi De Riu Federico Biglioli Giacomo De Riu 《Head & neck》2020,42(7):1560-1569
999.