全文获取类型
收费全文 | 12794篇 |
免费 | 744篇 |
国内免费 | 111篇 |
专业分类
耳鼻咽喉 | 119篇 |
儿科学 | 246篇 |
妇产科学 | 330篇 |
基础医学 | 1603篇 |
口腔科学 | 469篇 |
临床医学 | 1014篇 |
内科学 | 3145篇 |
皮肤病学 | 162篇 |
神经病学 | 1105篇 |
特种医学 | 504篇 |
外国民族医学 | 1篇 |
外科学 | 2249篇 |
综合类 | 41篇 |
预防医学 | 575篇 |
眼科学 | 164篇 |
药学 | 753篇 |
中国医学 | 33篇 |
肿瘤学 | 1136篇 |
出版年
2023年 | 98篇 |
2022年 | 241篇 |
2021年 | 418篇 |
2020年 | 242篇 |
2019年 | 355篇 |
2018年 | 446篇 |
2017年 | 306篇 |
2016年 | 359篇 |
2015年 | 418篇 |
2014年 | 637篇 |
2013年 | 714篇 |
2012年 | 1029篇 |
2011年 | 1051篇 |
2010年 | 563篇 |
2009年 | 534篇 |
2008年 | 814篇 |
2007年 | 837篇 |
2006年 | 724篇 |
2005年 | 717篇 |
2004年 | 688篇 |
2003年 | 567篇 |
2002年 | 444篇 |
2001年 | 107篇 |
2000年 | 103篇 |
1999年 | 121篇 |
1998年 | 90篇 |
1997年 | 90篇 |
1996年 | 72篇 |
1995年 | 69篇 |
1994年 | 71篇 |
1993年 | 55篇 |
1992年 | 72篇 |
1991年 | 60篇 |
1990年 | 45篇 |
1989年 | 57篇 |
1988年 | 44篇 |
1987年 | 42篇 |
1986年 | 47篇 |
1985年 | 27篇 |
1984年 | 29篇 |
1983年 | 23篇 |
1982年 | 19篇 |
1979年 | 27篇 |
1978年 | 13篇 |
1975年 | 13篇 |
1974年 | 13篇 |
1973年 | 19篇 |
1972年 | 11篇 |
1969年 | 16篇 |
1967年 | 14篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Cristina Benatti Silvia Alboni Giacomo Capone Daniela Corsini Federica Caggia Nicoletta Brunello Fabio Tascedda Joan M.C. Blom 《International journal of developmental neuroscience》2009,27(7):661-668
Protracted or recurrent pain and inflammation in the early neonatal period may cause long-lasting changes in central neural function. However, more research is necessary to better characterize the long-term behavioral sequelae of such exposure in the neonatal period. Objectives: (1) to study whether timing of postnatal exposure to persistent inflammation alters responsiveness to thermal pain in the adult animal; (2) to assess whether animals experiencing early postnatal chronic inflammation display altered anxiety related behavior; (3) to study the importance of genetic background. Newborn mice (outbred strain, CD1 and F1 hybrid strain, B6C3F1) received an injection of Complete Freund's Adjuvant (CFA) or saline on either postnatal day 1 or 14 (PND1; PND14) into the left hind paw. Pain to radiant heat and anxiety were examined in 12-week-old adult animals. Adult baseline PWL was significantly decreased in CD1 mice exposed to CFA on PND 1 and 14 as compared to their saline treated counterparts. B6C3F1 mice exposed to CFA on PND14 showed markedly reduced baseline PWL compared to the PND14 saline group. Persistent inflammation experienced by B6C3F1 mice on PND1 failed to affect baseline adult thermal responsiveness. Adult mice, CD1 and B6C3F1, displayed low anxiety traits only if they had been exposed to persistent inflammation on PND1 and not on PND14. Our research suggests a role for genetic background in modulating long-term behavioral consequences of neonatal persistent inflammation: the data support the hypothesis that pain experienced very early in life differentially affects adult behavioral and emotional responsiveness in outbred (CD1) and hybrid mice (B6C3F1). 相似文献
5.
6.
7.
Salvatore Sembronio Alberto Maria Albiero Massimo Robiony Fabio Costa Corrado Toro Massimo Politi 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2007,103(2):e1-e6
Septic arthritis of the temporomandibular joint (TMJ) is infrequently reported. We present a case of septic arthritis of the TMJ following the extraction of the left upper second molar that occurred 1 week before beginning of symptoms. No evident predisposing factors were detected. Arthroscopic diagnosis of septic arthritis, lysis and lavage, and capsular stretch were performed. Cultures taken from the TMJ space grew Streptococcus sp. After 1 month of antimicrobial therapy the patient was asymptomatic and mandibular function was normal. Literature related to septic arthritis of TMJ and its treatment was reviewed. Different surgical procedures are available to treat this condition. Arthroscopy should be preferred as initial treatment on account of the possibility of drainage and accurate lavage under direct visualization of joint space, at the same time allowing confirmation of diagnostic hypotheses. Improving joint mobility with lysis of adhesions and capsular stretch in an early stage of disease may be helpful in stopping the fibrosis process. 相似文献
8.
Marilyn Hravnak Leslie A Hoffman Melissa I Saul Thomas G Zullo Julie F Cuneo Ronald V Pellegrini 《American journal of critical care》2004,13(6):499-507; discussion 508
BACKGROUND: Studies suggest that patients who undergo off-pump coronary artery bypass grafting (OPCABG) have fewer short-term complications and use fewer inpatient resources than do patients who undergo standard coronary artery bypass grafting (CABG) with extracorporeal circulation. However, dissimilarity between groups in risk factors for complications has hindered interpretation of results. OBJECTIVES: To compare the prevalence of selected complications (atrial fibrillation, stroke, reoperation, and bleeding) and inpatient resource utilization (length of stay, discharge disposition, total charges) between subjects undergoing primary isolated CABG or OPCABG who were matched with respect to key risk factors. METHODS: Retrospective, causal-comparative survey conducted in 1 center for 18 months. Patients who underwent primary isolated CABG or OPCABG were matched for sex, age (within 2 years), left ventricular ejection fraction (within 0.05), and graft-patient ratio (exact match) and compared for prevalence of new-onset atrial fibrillation, stroke, reoperation within 24 hours, and bleeding. Statistical analysis included Wilcoxon and t tests for paired comparisons. RESULTS: The sample (107 matched pairs) was 63% male, with a mean age of 66 (SD 9.5) years, a mean left ventricular ejection fraction of 0.51 (SD 0.13), and a mean graft-patient ratio of 3.41 (SD 0.74). The 2 groups did not differ significantly in New York Heart Association class (P = .43), Acute Physiology and Chronic Health Evaluation III score (P = .22), postoperative beta-blocker use (P = .73), or comorbid conditions. None of the complications examined differed significantly between pairs. CONCLUSION: Patients with comparable risk profiles have similar prevalences of selected complications after CABG and OPCABG. 相似文献
9.
A Montanara R Pani R Pellegrini N S Polli S Soluri 《The British journal of radiology》1986,59(708):1171-1173
This paper describes research into measurement and reduction of the radiation dose to the lens during various examinations, namely skull and orbit, optic canal and optic strut, superior and inferior orbital fissure, localisation of foreign bodies in the eye, calcifications, orbital fractures, macrodacryography and orbital venography. Using rare-earth screens and high-sensitivity films, without an antiscattering grid, and with an added filtration of 0.5 mm Cu, it is possible to reduce the radiological risk during all investigations involving skull, orbit and eyeballs, while maintaining a good image quality. Particularly in those examinations with direct magnification (macrodacryography and venography, foreign bodies in the eye, orbital fractures), the dose to the lens is very low: less than 0.2 mGy/radiograph. 相似文献
10.