全文获取类型
收费全文 | 57829篇 |
免费 | 1872篇 |
国内免费 | 1840篇 |
专业分类
耳鼻咽喉 | 379篇 |
儿科学 | 1256篇 |
妇产科学 | 1601篇 |
基础医学 | 3492篇 |
口腔科学 | 965篇 |
临床医学 | 6573篇 |
内科学 | 7289篇 |
皮肤病学 | 394篇 |
神经病学 | 1386篇 |
特种医学 | 2595篇 |
外国民族医学 | 2篇 |
外科学 | 4040篇 |
综合类 | 11345篇 |
一般理论 | 5篇 |
预防医学 | 8035篇 |
眼科学 | 927篇 |
药学 | 4121篇 |
中国医学 | 4066篇 |
肿瘤学 | 3070篇 |
出版年
2023年 | 106篇 |
2022年 | 160篇 |
2021年 | 202篇 |
2020年 | 151篇 |
2019年 | 140篇 |
2018年 | 246篇 |
2017年 | 202篇 |
2016年 | 284篇 |
2015年 | 286篇 |
2014年 | 468篇 |
2013年 | 725篇 |
2012年 | 1129篇 |
2011年 | 3809篇 |
2010年 | 2225篇 |
2009年 | 1374篇 |
2008年 | 1743篇 |
2007年 | 1464篇 |
2006年 | 1571篇 |
2005年 | 2512篇 |
2004年 | 7146篇 |
2003年 | 6660篇 |
2002年 | 5273篇 |
2001年 | 4095篇 |
2000年 | 2742篇 |
1999年 | 3042篇 |
1998年 | 2099篇 |
1997年 | 1798篇 |
1996年 | 1063篇 |
1995年 | 899篇 |
1994年 | 1027篇 |
1993年 | 1587篇 |
1992年 | 1153篇 |
1991年 | 947篇 |
1990年 | 617篇 |
1989年 | 439篇 |
1988年 | 316篇 |
1987年 | 272篇 |
1986年 | 260篇 |
1985年 | 136篇 |
1984年 | 97篇 |
1983年 | 78篇 |
1982年 | 65篇 |
1981年 | 65篇 |
1980年 | 74篇 |
1979年 | 71篇 |
1978年 | 64篇 |
1977年 | 54篇 |
1975年 | 49篇 |
1974年 | 48篇 |
1973年 | 59篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Ciléin Kearns Nethmi Kearns Anna M. Paisley 《Journal of visual communication in medicine》2020,43(2):76-83
AbstractSupporting patients in making informed healthcare decisions is a cornerstone of ethical medical practice. Surgeons frequently draw for and show images to patients when consenting them for operations but the value of this practice in informed decision-making is unclear. An audit was conducted in a General Surgery Department. 244 patients completed questionnaires on the value of visual materials when giving consent for surgery. The complexity of the operations was classified into “simple”, “moderate” or “complex”. 100% of patients felt they had given informed consent to surgery. 62% of patients received at least one form of visual material during the consenting process. All patients who received a drawing, and 99% of those provided with other images, valued these resources. Visual materials were considered more useful to patients when giving consent for moderate or complex operations than simple ones. Approximately one third of patients who did not receive visual materials would have appreciated these when making an informed decision. This research highlights the value of surgeons drawing for, and providing other visual resources to, their patients as part of the consent process. There is a role for further research and training materials in drawing skills for surgeons. 相似文献
2.
The group of Professor Ning Jiao and Professor Song Song have made new progress in the field of electrophilic halogenation modification of electron-deficient aromatics 下载免费PDF全文
3.
Increased arterial stiffness in young normotensive patients with Turner syndrome: associations with vascular biomarkers 下载免费PDF全文
4.
Astrid Ruiz-Marg in Berenice M Rom n-Calleja Paulina Moreno-Guill n Jos A Gonz lez-Regueiro Deyanira K sulas-Delint Alejandro Campos-Murgu a Nayelli C Flores-Garc a Ricardo Ulises Mac as-Rodr guez 《World journal of gastrointestinal oncology》2021,13(10):1440-1452
Hepatocellular carcinoma (HCC) is the most frequent primary liver cancer and presents together with cirrhosis in most cases. In addition to commonly recognized risk factors for HCC development, such as hepatitis B virus/hepatitis C virus infection, age and alcohol/tobacco consumption, there are nutritional risk factors also related to HCC development including high intake of saturated fats derived from red meat, type of cooking (generation of heterocyclic amines) and contamination of foods with aflatoxins. On the contrary, protective nutritional factors include diets rich in fiber, fruits and vegetables, n-3 polyunsaturated fatty acids and coffee. While the patient is being evaluated for staging and treatment of HCC, special attention should be paid to nutritional support, including proper nutritional assessment and therapy by a multidisciplinary team. It must be considered that these patients usually develop HCC on top of long-lasting cirrhosis, and therefore they could present with severe malnutrition. Cirrhosis-related complications should be properly addressed and considered for nutritional care. In addition to traditional methods, functional testing, phase angle and computed tomography scan derived skeletal muscle index-L3 are among the most useful tools for nutritional assessment. Nutritional therapy should be centered on providing enough energy and protein to manage the increased requirements of both cirrhosis and cancer. Supplementation with branched-chain amino acids is also recommended as it improves response to treatment, nutritional status and survival, and finally physical exercise must be encouraged and adapted to individual needs. 相似文献
5.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516
6.
Bi-Hua BIE Yong CHEN Zhi-Qi ZHAO Institute of Neurobiology Fu-Dan University Shanghai China Institute of Shanghai Physiology Chinese Academy of Sciences Shanghai China 《中国神经科学杂志》2006,(2)
Objective Ligustrazine, also named as tetramethylpyrazine, is a compound purified from Ligusticum chuanxiong hort and has ever been testified to be a calcium antagonist. The present investigation was to determine the antinoci-ceptive effect of ligustrazine and, if any, the peripheral ionic mechanism involved. Methods Paw withdrawal Latency ( PWL) to noxious heating was measured in vivo and whole-cell patch recording was performed on small dorsal root ganglion (DRG) neurons. Results Intraplantar injection of ligustrazine (0.5 mg in 25μl) significantly prolonged the withdrawal latency of ipsilateral hindpaw to noxious heating in the rat. Ligustrazine not only reversibly inhibited high-voltage gated calcium current of dorsal root ganglion (DRG) neuron in dose-dependent manner with IC50 of 1.89 mmol/L, but also decreased tetrodotoxin (TTX) -resistant sodium current in relatively selective and dose-dependent manner with IC50 of 2.49 mmol/L. Conclusion The results suggested that ligustrazine could elevate the threshold of thermal nociception through inhibiting the high-voltage gated calcium current and TTX-resistant sodium current of DRG neuron in the rat. 相似文献
7.
原北京医科大学(现为北京大学医学部)从20世纪90年代初开始,积极寻求与美国中华医学基金会的合作以促进医学伦理学的学科发展和国际化水平的提高。十几年来,北京大学医学部作为基地和依托极大地支持和引领了我国医学伦理学的教学改革与发展,增强了相关人员的医学伦理意识以及医学伦理学理论对实践的指导作用,促进了伦理学知识和能力的培训,提升了我国生物医学科研伦理的实力,奠定了医学伦理学继续教育的基础,使医学伦理学实现了系统性和跨越式的发展。 相似文献
8.
9.
10.