全文获取类型
收费全文 | 1802篇 |
免费 | 78篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 46篇 |
妇产科学 | 40篇 |
基础医学 | 166篇 |
口腔科学 | 47篇 |
临床医学 | 526篇 |
内科学 | 219篇 |
皮肤病学 | 58篇 |
神经病学 | 59篇 |
特种医学 | 235篇 |
外科学 | 185篇 |
综合类 | 41篇 |
预防医学 | 67篇 |
眼科学 | 13篇 |
药学 | 104篇 |
中国医学 | 4篇 |
肿瘤学 | 109篇 |
出版年
2023年 | 6篇 |
2021年 | 13篇 |
2020年 | 14篇 |
2019年 | 17篇 |
2018年 | 22篇 |
2017年 | 10篇 |
2016年 | 14篇 |
2015年 | 33篇 |
2014年 | 44篇 |
2013年 | 64篇 |
2012年 | 63篇 |
2011年 | 65篇 |
2010年 | 58篇 |
2009年 | 72篇 |
2008年 | 72篇 |
2007年 | 79篇 |
2006年 | 64篇 |
2005年 | 59篇 |
2004年 | 71篇 |
2003年 | 53篇 |
2002年 | 58篇 |
2001年 | 66篇 |
2000年 | 57篇 |
1999年 | 54篇 |
1998年 | 98篇 |
1997年 | 95篇 |
1996年 | 85篇 |
1995年 | 68篇 |
1994年 | 54篇 |
1993年 | 58篇 |
1992年 | 29篇 |
1991年 | 32篇 |
1990年 | 35篇 |
1989年 | 27篇 |
1988年 | 37篇 |
1987年 | 14篇 |
1986年 | 16篇 |
1985年 | 15篇 |
1984年 | 15篇 |
1983年 | 10篇 |
1982年 | 9篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 6篇 |
1975年 | 5篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1971年 | 7篇 |
1970年 | 7篇 |
1966年 | 9篇 |
排序方式: 共有1923条查询结果,搜索用时 31 毫秒
991.
992.
Non-calcified ductal carcinoma in situ: ultrasound and mammographic findings correlated with histological findings 总被引:1,自引:0,他引:1
Cho KR Seo BK Kim CH Whang KW Kim YH Kim BH Woo OH Lee YH Chung KB 《Yonsei medical journal》2008,49(1):103-110
PURPOSE: To evaluate radiological findings of non-calcified ductal carcinoma in situ (DCIS) and to correlate those with histological features. MATERIALS AND METHODS: From July 2002 to March 2006, 22 patients with histologically-proven non-calcified DCIS were included. Mammography was obtained in 19 patients, ultrasound in 18 patients, and both examinations in 15 patients. Radiological findings were evaluated according to the Breast Imaging Reporting and Data System by American College of Radiology. Histological tumor subtype and Van Nuys classification of DCIS were assessed. RESULTS: Histological subtypes consisted of mixed type in 11 patients (50%), comedo in 4 (18%), cribriform in 4 (18%), papillary type in 2 (9%), and solid in one (5%). According to Van Nuys classification, group 3 DCIS was observed in 13 (59%) patients. In the 19 patients who underwent mammography, 13 patients presented with abnormal findings: focal asymmetry in 7 patients (37%), masses in 4 (21%), skin thickening in one (5%), and architectural distortion in one (5%). In the 18 patients who had received breast ultrasound, a mass was present in 15 (83%) patients and ductal changes in 3 patients (17%). Sixty percent of patients with masses on ultrasound had group 3 DCIS and 100% of patients with ductal change had group 1 DCIS (p = 0.017). CONCLUSION: Diagnosis of non-calcified DCIS by mammography is not an easy task due to the lack of typical malignant calcifications or masses. High resolution ultrasound can be useful for detecting non-calcified DCIS, and ultrasound findings are correlated with histological features. 相似文献
993.
994.
Gastric pneumatosis: sign of biliary stent-related perforation 总被引:2,自引:0,他引:2
995.
Alyce Allenbach BSN RN Elizabeth A. Steinmiller MSN RN CS 《Journal for specialists in pediatric nursing》2004,9(1):24-31
ISSUES AND PURPOSE Inconsistent nursing practices created nurse‐patient boundary issues on a cardiac step‐down unit related to confidentiality, limit setting, and professionalism with patients and families awaiting organ transplantation. CONCLUSIONS A staff work group designed and implemented a plan to translate the principles of therapeutic relationships into daily practice. PRACTICE IMPLICATIONS A work plan developed for nursing staff outlined concrete solutions and resources available within the hospital. This framework can be used to empower staff in the ongoing effort to manage relationships with chronically ill patients and their families. 相似文献
996.
Karen Ragaisis MSN APRN CARN BC Geraldine Pearson PhD APRN CS 《Journal of child and adolescent psychiatric nursing》2004,17(4):173-176
This case study presents a consultation-liaison client and family. The author illustrates how a coordinated staff effort and the nurse-patient relationship resulted in improved treatment. 相似文献
997.
Jerrilynn D. Burrowes Sharon H. Stall MPH. RD. CS 《Geriatric Nephrology and Urology》1995,5(3):167-176
The elderly dialysis population is increasing. Current nutritional recommendations for this group of patients are based on extrapolations of the recommendations for the general well elderly and adult hemodialysis populations. More than 60% of patients receiving renal replacement therapy in the US will be over the age of 65 by the year 2000. This mandates the need for the development of age-specific nutrient recommendations for elderly dialysis patients. This article presents methods for assessing nutritional status and identifying and treating malnutrition in elderly hemodialysis patients, and psychosocial issues affecting their food intake. Protein, energy and vitamin recommendations for the general elderly and adult hemodialysis populations are also reviewed, and questions raised as to their appropriateness in elderly hemodialysis patients. 相似文献
998.
Julie Griffie RN CS APNP David E. Weissman MD 《Journal of pain and symptom management》1996,12(6):360-363
This article describes a 3-day nurse preceptorship education program in cancer pain and palliative medicine at the Medical College of Wisconsin (MCW). The program includes experiential and didactic information, skills development, and assistance with planning for institutional change in the delivery of health care services. The education program is centered around five teaching modules: pain, nonpain symptoms, hospice, nursing professional issues, and palliative care. Evaluation data from a recent cohort of 23 nurses demonstrate that learning and personal objectives were met to a high degree of satisfaction. 相似文献
999.
山莨菪碱四个光学异构体的合成和分离 总被引:5,自引:0,他引:5
以6-(甲氧)亚甲氧基托品酮(Ⅰ)为原料,与(+)L-酒石酸或(-)D-酒石酸成盐,可分离得到右旋的6-(甲氧)亚甲氧基托品酮[(+)Ⅰ]和左旋的6-(甲氧)亚甲氧基托品酮[(-)Ⅰ].(+)Ⅰ和(-)Ⅰ氢化还原后,分别与α-甲酰基苯乙酸甲酯进行酯交换,硼氢化钠还原侧链上醛基,水解脱去羟基保护基得到左旋山良菪碱(-)Ⅳ和右旋山莨菪碱(+)Ⅳ.(-)Ⅳ和(+)Ⅳ分別与(-)二苯甲酰酒石酸和(+)二苯甲酰酒石酸成盐,可用分步结晶法拆分到山崀菪碱的四个光学异构体。 相似文献
1000.
非限制性肩关节置换术 总被引:2,自引:0,他引:2
目的:作者对29例肩关节炎和肱骨近端骨折患者的36侧肩关节,采用非限制性假体做全肩关节置换术24个、半肩(即人工肱骨头)置换术12个。方法:所有36个肱骨头假体和13个肩盂假体为骨长入型非骨水泥假体,余11个肩盂假体为骨水泥假体。患者术时平均年龄63岁,术后平均随访6.2年(3.3~10.4年)。结果:术后肩关节疼痛缓解率达91.3%,主动活动度增加:前屈47°、外展43°、外旋30°、内旋4个节段。6个日常生活动作能力平均评分由术前0.8分增加到术后3.1分。术后X线片示肱骨头假体上移8例,其中6例伴有肩袖撕裂甚或缺损。1例肱骨头假体和9例肩盂假体周围可见X线透亮线。肱骨头假体松动1例;肩盂假体松动2例。结论:显示非限制性肩关节置换术是一种疗效可靠满意的手术方法 相似文献