全文获取类型
收费全文 | 6966篇 |
免费 | 485篇 |
国内免费 | 142篇 |
专业分类
耳鼻咽喉 | 39篇 |
儿科学 | 182篇 |
妇产科学 | 220篇 |
基础医学 | 868篇 |
口腔科学 | 176篇 |
临床医学 | 699篇 |
内科学 | 1389篇 |
皮肤病学 | 145篇 |
神经病学 | 398篇 |
特种医学 | 567篇 |
外科学 | 865篇 |
综合类 | 403篇 |
一般理论 | 2篇 |
预防医学 | 402篇 |
眼科学 | 113篇 |
药学 | 503篇 |
4篇 | |
中国医学 | 124篇 |
肿瘤学 | 494篇 |
出版年
2023年 | 53篇 |
2022年 | 115篇 |
2021年 | 208篇 |
2020年 | 120篇 |
2019年 | 150篇 |
2018年 | 231篇 |
2017年 | 134篇 |
2016年 | 143篇 |
2015年 | 225篇 |
2014年 | 265篇 |
2013年 | 349篇 |
2012年 | 491篇 |
2011年 | 480篇 |
2010年 | 311篇 |
2009年 | 310篇 |
2008年 | 354篇 |
2007年 | 406篇 |
2006年 | 349篇 |
2005年 | 291篇 |
2004年 | 252篇 |
2003年 | 251篇 |
2002年 | 219篇 |
2001年 | 137篇 |
2000年 | 161篇 |
1999年 | 118篇 |
1998年 | 105篇 |
1997年 | 109篇 |
1996年 | 123篇 |
1995年 | 93篇 |
1994年 | 80篇 |
1993年 | 70篇 |
1992年 | 79篇 |
1991年 | 60篇 |
1990年 | 52篇 |
1989年 | 72篇 |
1988年 | 72篇 |
1987年 | 62篇 |
1986年 | 72篇 |
1985年 | 75篇 |
1984年 | 39篇 |
1983年 | 39篇 |
1982年 | 35篇 |
1981年 | 35篇 |
1980年 | 24篇 |
1979年 | 26篇 |
1978年 | 25篇 |
1977年 | 25篇 |
1976年 | 27篇 |
1975年 | 24篇 |
1974年 | 12篇 |
排序方式: 共有7593条查询结果,搜索用时 140 毫秒
31.
Tsung-Hui Hu Jui-Wei Lin Chi-Sin Changchien Shang-Yun Liu Shue-Shian Chiou Jiin-Haur Chuang 《台湾医志》2003,102(10):707-714
BACKGROUND AND PURPOSE: Gastrointestinal stromal tumors (GISTs), identified by the presence of CD117 (KIT), were previously classified as gastric and intestinal smooth muscle tumors prior to the availability of immunohistochemical methods. This study evaluated the percentage of GISTs previously diagnosed as gastric smooth muscle tumors in our hospital during an 11-year period. METHODS: A total of 81 surgically resected gastric smooth muscle tumor specimens from 81 patients were collected from January 1986 to December 1997. Immunohistochemical studies were performed on these tumors with antibodies of CD34, CD117, smooth muscle actin (SMA), S-100, and desmin. RESULTS: Among the 81 tumors, 74 (91.4%) were CD117-positive and were classified as GISTs. Among the 74 GISTs, CD34 was positive in 72 tumors (97.3%), SMA was positive in 12 tumors (16.2%), desmin was positive in 5 tumors (6.7%), and S-100 was positive in 4 tumors (5.4%). The 7 tumors classified as non-GISTs had the following immunohistochemical characteristics: 1 was a CD117-negative CD34-positive stromal tumor (GINST) [1/81, 1.2%]; 3 were schwannomas with strong S-100-positive characteristics (3/81, 3.7%); and 3 were smooth muscle tumors with both SMA- and desmin-positive status (3/81, 3.7%). No clear relationship between CD117 or CD34 expression and prognosis was found for these tumors. CONCLUSIONS: The majority (91.4%) of gastric tumors originally diagnosed as gastric smooth muscle tumors were GISTs, except for small groups of smooth muscle tumors and schwannomas. 相似文献
32.
LN Weinberger MJ Zirwas JC English III 《Journal of the European Academy of Dermatology and Venereology》2007,21(2):156-162
Male genital oedema can be defined as swelling or the appearance of swelling of the scrotum and/or the penile shaft and prepuce. Despite the various causes of genital oedema reported in the published work, a concise approach to the evaluation and management has not been sufficiently addressed. 相似文献
33.
34.
35.
36.
Uroscopy in the 21st century: high-field NMR spectroscopy 总被引:1,自引:1,他引:0
Neild GH; Foxall PJ; Lindon JC; Holmes EC; Nicholson JK 《Nephrology, dialysis, transplantation》1997,12(3):404-417
From the experiments described, it can be seen that there are different
research approaches that can be taken and these are summarized in Table 1.
Whereas much scientific research is principally hypothesis led, there
remains, nevertheless, an important place for exploratory research. High
resolution NMR can measure, directly and simultaneously, a wide range of
endogenous metabolites in biological fluids and has the unique capability
of providing structural information on the metabolites detected. It has
proved to be a powerful research tool with which to study inherited
metabolic diseases, renal disease, drug metabolism, and toxicity, and can
be used to monitor the effects of drug therapy. For instance, by using a
library of experimental toxins one can map the metabolic profile of
site-specific nephron injury. With this approach in man one could
eventually take an unknown disease such as Balkan nephropathy and predict
the initial site of tubular injury, the mode of injury and therefore the
kind of toxin capable of producing that injury. NMR spectroscopic
techniques are still advancing rapidly, with ever increasing sensitivity
and sophistication of NMR pulse sequences to enhance structural elucidation
in complex mixtures. Given the advances in directly coupled HPLC-NMR and
even HPLC-NMR-mass spectroscopy it is likely that these technologies in
conjunction with pattern recognition will make major contribution to our
understanding of renal processes and provide new diagnostic insights in the
21st century.
相似文献
37.
在儿科护理学教学中采用模拟病例教学方法,旨在探寻提高儿科护理学实习质量的新途径.在儿科护理学教学中,将学生分为对照组和实验组,从理论授课阶段、见习阶段和实习阶段逐步实施模拟病例教学方法,并对教学效果进行了讨论和评价. 相似文献
38.
J Y Chuang 《International surgery》1990,75(2):127-130
Two hundred patients were given peridural anaesthesia with 16 ml of 0.975% plain bupivacaine in connection with operations on the lower extremities, and the lower abdomen or perineum. More than 92% of these had a good anaesthesia and a pronounced motor block. The frequency of serious complications was low but when they existed they were usually due to the spread of the anaesthesia which led to circulatory and respiratory insufficiency. It is therefore essential to be able to recognize such complications early and treat them rapidly. 相似文献
39.
Yao-Chung Chuang Tsu-Kung Lin Chun-Chung Lui Shang-Der Chen Chen-Sheng Chang 《Seizure》2004,13(3):179-182
We report a 41-year-old woman with complex reflex epilepsy in which seizures were induced exclusively by the act of tooth brushing. All the attacks occurred with a specific sensation of sexual arousal and orgasm-like euphoria that were followed by a period of impairment of consciousness. Ictal EEG demonstrated two events of epileptic seizure that were provoked after tooth brushing for 38 and 14 seconds, respectively. The interictal EEG showed epileptiform discharges over the right anterior temporal region and interictal single photon emission computed tomography (SPECT) scan showed relative hypoperfusion in the uncus of right temporal lobe. Brain magnetic resonance imaging (MRI) revealed right hippocampal atrophy. We suggest that tooth-brushing epilepsy, especially with sexual ictal manifestations, may provide insight into the cerebral pathophysiology at the right temporolimbic structure. 相似文献
40.
Hui-Ching Chuang Chih-Ying Su Seng-Feng Jeng Chih-Yen Chien 《Otolaryngology--head and neck surgery》2007,137(4):632-635
OBJECTIVE: To preserve oral function after buccal cancer resection, a free anterior lateral thigh flap (ALTF) was used to cover the buccal mucosal defect. STUDY DESIGN AND SETTING: Nine patients who underwent primary surgical treatment between June 2005 and September 2006 for buccal cancer were enrolled in this study. An ALTF was used to repair the defect immediately after tumor resection. Oral function, including mouth-opening width, oral intake, and teeth cleaning, were compared pre- and postoperatively. RESULTS: No difference was observed in the mouth-opening width between that preoperatively and three months postoperatively (P = 0.54). The oral intake and teeth cleaning also remained unchanged three months postoperatively. CONCLUSION: Repair of a buccal mucosa defect with a free anterior lateral thigh flap is a good alternative for selected patients who undergo resection of buccal cancer; oral function is likely to be preserved. 相似文献