全文获取类型
收费全文 | 34587篇 |
免费 | 2224篇 |
国内免费 | 99篇 |
专业分类
耳鼻咽喉 | 500篇 |
儿科学 | 856篇 |
妇产科学 | 504篇 |
基础医学 | 4164篇 |
口腔科学 | 455篇 |
临床医学 | 3771篇 |
内科学 | 7066篇 |
皮肤病学 | 428篇 |
神经病学 | 3024篇 |
特种医学 | 1379篇 |
外科学 | 5731篇 |
综合类 | 402篇 |
一般理论 | 40篇 |
预防医学 | 3128篇 |
眼科学 | 531篇 |
药学 | 2576篇 |
中国医学 | 31篇 |
肿瘤学 | 2324篇 |
出版年
2024年 | 27篇 |
2023年 | 250篇 |
2022年 | 475篇 |
2021年 | 1090篇 |
2020年 | 642篇 |
2019年 | 980篇 |
2018年 | 1174篇 |
2017年 | 814篇 |
2016年 | 834篇 |
2015年 | 992篇 |
2014年 | 1494篇 |
2013年 | 1957篇 |
2012年 | 2819篇 |
2011年 | 2883篇 |
2010年 | 1507篇 |
2009年 | 1398篇 |
2008年 | 2408篇 |
2007年 | 2361篇 |
2006年 | 2167篇 |
2005年 | 2183篇 |
2004年 | 2061篇 |
2003年 | 1845篇 |
2002年 | 1692篇 |
2001年 | 200篇 |
2000年 | 188篇 |
1999年 | 227篇 |
1998年 | 320篇 |
1997年 | 242篇 |
1996年 | 240篇 |
1995年 | 165篇 |
1994年 | 169篇 |
1993年 | 139篇 |
1992年 | 97篇 |
1991年 | 87篇 |
1990年 | 71篇 |
1989年 | 70篇 |
1988年 | 67篇 |
1987年 | 47篇 |
1986年 | 40篇 |
1985年 | 45篇 |
1984年 | 57篇 |
1983年 | 63篇 |
1982年 | 70篇 |
1981年 | 50篇 |
1980年 | 33篇 |
1979年 | 22篇 |
1978年 | 25篇 |
1977年 | 19篇 |
1976年 | 12篇 |
1975年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
The study reports on a questionnaire study of final-year medical students' self-reported attitudes to dealing with dying patients. All respondents had some direct clinical experience with dying patients, and reported that such encounters were largely unproblematic. Alleviating patient anxiety and counseling relatives were seen as important aspects of the doctor's role, along with diagnosis, and management of symptoms. “High fear” respondents were more likely to report difficulty in discussing the prognosis with the dying and to experience minor psychological problems. 相似文献
42.
Background
Resident-led morning report is an integral part of most residency programs and is ranked among the most valuable of educational experiences. The objectives of this study were to evaluate the effect of a resident-as-teacher educational intervention on the educational and teaching experience of morning report. 相似文献43.
44.
45.
Kevin M Kernek Matteo Brunelli Thomas M Ulbright John N Eble Guido Martignoni Shaobo Zhang Helen Michael Oscar W Cummings Liang Cheng 《Modern pathology》2004,17(11):1309-1313
The over-representation of chromosome 12p sequences is crucial for the development of invasive testicular germ cell tumors. Testicular cancer patients may have metastatic tumors of diverse histologic types, including adenocarcinoma, undifferentiated carcinoma, sarcoma, or other malignancies that lack features of germ cell tumors. We sought to investigate the possible germ cell origin of such tumors using interphase fluorescence in situ hybridization. In all, 10 metastatic malignant somatic-type tumors from patients with histories of testicular cancer, as well as one malignant somatic-type tumor from a patient with primary mediastinal germ cell tumor were studied and included: adenocarcinoma (five cases), poorly differentiated carcinoma (one), sarcoma (four), and neuroendocrine carcinoma (one). The tumors were analyzed using fluorescence in situ hybridization using 12p spectrum green and 12 centromeric spectrum orange probes in paraffin sections. The patients ranged in age from 27 to 55 years (mean, 43). Colon and lung cancers from patients without germ cell tumors were used as controls. Adequate signals were observed in all tumors. Gain of chromosome 12p was seen in six tumors. None of the control tumors showed 12p amplification. Fluorescence in situ hybridization for 12p amplification in routinely processed surgical specimens is a useful adjuvant diagnostic tool in confirming the germ cell origin of metastatic tumors having the histologic appearance of somatic-type neoplasms. 相似文献
46.
Wilfrid No?l Raby Patricia A Modica Robyn J Wolintz Kevin Murtaugh 《Journal of ocular pharmacology and therapeutics》2006,22(1):68-75
A case is presented in which a woman diagnosed with a longstanding history of idiopathic intracranial hypertension reported improvement of frontal headaches, photophobia, transient blindness, enlarged blind spots, and tinnitus after smoking marijuana. All these symptoms and signs were associated with increased intracranial pressure (220-425 mm of water). Treatment with dronabinol at a dose of 10 mg twice a day, then reduced to 5 mg twice a day, relieved all of her symptoms. Previously noted papilledema and enlargement of blind spots also resolved, and this, in the absence of psychoactive effect or weight gain. 相似文献
47.
Kevin J. Donly DDS MS 《Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]》2005,17(6):380-380
The popularity of vital tooth whitening has increased significantly over the past two decades. Professionally supervised "in-office" and "at-home" tooth whitening methods have been documented in the literature with evidence of safety and effectiveness. Although the literature includes considerable information about vital tooth whitening in adults, minimal information is available concerning vital tooth whitening in children and adolescents.
The need to provide vital tooth whitening for children might be infrequent owing to the natural whiteness of children's teeth. However, there are circumstances when tooth whitening can be desirable for children, such as fluorosis discoloration, generalized tooth darkening, post-traumatic injury discoloration, and postorthodontic tooth discoloration.
Few well-controlled clinical trials evaluating the safety and effectiveness of vital tooth whitening in children are available in the literature, Furthermore, these published clinical trials were carried out by the same principal investigator. This review examines these trials and offers recommendations accordingly. 相似文献
The need to provide vital tooth whitening for children might be infrequent owing to the natural whiteness of children's teeth. However, there are circumstances when tooth whitening can be desirable for children, such as fluorosis discoloration, generalized tooth darkening, post-traumatic injury discoloration, and postorthodontic tooth discoloration.
Few well-controlled clinical trials evaluating the safety and effectiveness of vital tooth whitening in children are available in the literature, Furthermore, these published clinical trials were carried out by the same principal investigator. This review examines these trials and offers recommendations accordingly. 相似文献
48.
Stomach rupture can occur as a consequence of the expansion of compressed air during rapid ascent after diving. We present
the case of a middle-aged woman who suffered a gastric tear from surfacing too quickly after diving, and discuss the diagnosis
and management of such patients by reviewing previously reported similar events. Gastric barotrauma should be suspected in
divers who complain of abdominal pain, even in the absence of frank signs of peritoneal irritation. Although pneumoperitoneum
is always present in these patients, it can also occur as a consequence of pulmonary barotrauma, making gastroscopy or radiological
contrast studies, or both, essential for a definitive diagnosis. Surgical repair represents the treatment of choice for an
active full-thickness tear and, if associated with arterial gas embolism or decompression sickness, should ideally be performed
in a center where a category I (intensive care-capable) hyperbaric unit is available.
Received: March 18, 2002 / Accepted: September 3, 2002
Reprint requests to: L.V. Titu 相似文献
49.
The effectiveness of interdisciplinary treatments for chronic pain is well established. In general, these treatments decrease psychosocial distress and increase physical abilities. Further, return to work rates following interdisciplinary treatment tend to be quite high. Previous studies have highlighted a number of factors that individually influence return to work rates; however, there is a need for more comprehensive and unified models that allow an evaluation of the inter-relations among these factors. The present investigation examined how demographic and treatment outcome variables interacted to influence post-treatment return to work rates in a sample of individuals with chronic pain following interdisciplinary treatment. Results indicated that patient age, lifting ability, pain duration, depression level, and reported disability were individually related to return to work; however, when these variables were evaluated relative to one another, level of depression and patient age had the best ability to predict post-treatment work status. These results add to the literature by specifically highlighting post-treatment factors that best discriminate patients who had returned to work from those that had not. Furthermore, they provide evidence that general emotional distress is perhaps the most important predictor of work status following treatment. 相似文献
50.