全文获取类型
收费全文 | 10447篇 |
免费 | 961篇 |
国内免费 | 54篇 |
专业分类
耳鼻咽喉 | 100篇 |
儿科学 | 272篇 |
妇产科学 | 372篇 |
基础医学 | 1601篇 |
口腔科学 | 136篇 |
临床医学 | 836篇 |
内科学 | 2062篇 |
皮肤病学 | 495篇 |
神经病学 | 1045篇 |
特种医学 | 390篇 |
外科学 | 1349篇 |
综合类 | 80篇 |
一般理论 | 2篇 |
预防医学 | 1062篇 |
眼科学 | 102篇 |
药学 | 854篇 |
中国医学 | 37篇 |
肿瘤学 | 667篇 |
出版年
2023年 | 83篇 |
2022年 | 92篇 |
2021年 | 166篇 |
2020年 | 142篇 |
2019年 | 194篇 |
2018年 | 207篇 |
2017年 | 191篇 |
2016年 | 197篇 |
2015年 | 221篇 |
2014年 | 243篇 |
2013年 | 454篇 |
2012年 | 527篇 |
2011年 | 505篇 |
2010年 | 321篇 |
2009年 | 310篇 |
2008年 | 473篇 |
2007年 | 433篇 |
2006年 | 476篇 |
2005年 | 445篇 |
2004年 | 444篇 |
2003年 | 382篇 |
2002年 | 340篇 |
2001年 | 314篇 |
2000年 | 334篇 |
1999年 | 303篇 |
1998年 | 139篇 |
1997年 | 103篇 |
1996年 | 110篇 |
1995年 | 124篇 |
1994年 | 100篇 |
1993年 | 93篇 |
1992年 | 209篇 |
1991年 | 221篇 |
1990年 | 203篇 |
1989年 | 233篇 |
1988年 | 205篇 |
1987年 | 191篇 |
1986年 | 169篇 |
1985年 | 172篇 |
1984年 | 142篇 |
1983年 | 109篇 |
1982年 | 91篇 |
1981年 | 69篇 |
1979年 | 104篇 |
1978年 | 76篇 |
1977年 | 81篇 |
1976年 | 63篇 |
1975年 | 64篇 |
1974年 | 65篇 |
1973年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Caroline Y. Yang Peter E. Andersen Edwin C. Everts James I. Cohen 《The Laryngoscope》1998,108(7):1006-1008
Objective: Although there is a generalized understanding of the relatively low overall incidence of nodal disease from purely glottic carcinoma, the exact role for elective neck treatment in the management of this disease remains controversial. The purpose of this study was to identify the incidence of occult nodal disease (including paratracheal) in patients who have glottic carcinoma without significant extra-glottic extension and to identify which patients are at risk for this. A retrospective chart review of 92 such patients who had either undergone neck dissection or been observed for a minimum of 2 years was performed. Results: For the 92 patients, neck treatment consisted of observation in 68 patients, paratracheal node dissection in four, unilateral neck dissection in four, unilateral neck dissection and excision of paratracheal nodes in 14, and bilateral neck dissection with paratracheal node excision in two. Of the 24 nodal dissections performed, four were positive for occult metastatic disease. No patient in the observation group developed nodal disease. Conclusion: The incidence of occult nodal disease in NO glottic carcinoma is low, 0% in early stage disease (T1–T2) and 19% in late stage disease (T3–T4). Nodes at highest risk included only the paratracheal, level II, and level III. Elective neck treatment should only be undertaken for advanced (T3–T4) disease and even then is of questionable benefit. If undertaken, it should have a low potential morbidity, such as selective neck dissection or radiation. Computed tomography was not useful in staging the neck for this subset of patients. 相似文献
82.
B Barstad T I A S?rensen A Tj?nneland D Johansen U Becker I B Andersen M Gr?nbaek 《European journal of cancer prevention》2005,14(3):239-243
The objective was to study prospectively the relation between quantity and type of alcohol and risk of gastric cancer. In a pooled database from three population studies conducted in 1964-1992, a total of 15,236 men and 13,227 women were followed for a total of 389,051 person-years. During follow-up 122 incident cases of gastric cancer were identified. Total alcohol intake itself was not associated with gastric cancer, but type of alcohol seemed to influence risk. Compared with non-wine drinkers, participants who drank 1-6 glasses of wine had a relative risk ratio of 0.76 (95% confidence interval (CI) 0.50-1.16), whereas those who drank >13 glasses of wine per week had a relative risk ratio of 0.16 (95% CI 0.02-1.18). Linear trend test showed a significant association with a relative risk ratio of 0.60 (95% CI 0.39-0.93) per glass of wine drunk per day. These relations persisted after adjustment for age, gender, educational level, body mass index, smoking habits, inhalation and physical activity. There was no association between beer or spirits drinking and gastric cancer. In conclusion, the present study suggests that a daily intake of wine may prevent development of gastric cancer. 相似文献
83.
84.
The effect of a low-dose triphasic oral contraceptive (ethinyl estradiol and levonorgestrel) on glucose tolerance, plasma insulin response to a glucose challenge, and insulin receptor binding to monocytes and erythrocytes was investigated in seven women with previous gestational diabetes and seven nondiabetic control subjects. Investigations were performed in the luteal phase before the hormonal intake and after hormonal treatment for 2 and 6 months. Before treatment, women with previous gestational diabetes had significantly impaired glucose tolerance (p less than 0.05) when compared with the healthy controls, but no differences in insulin receptor binding were observed. Glucose tolerance and the insulin response to oral glucose remained unchanged in both groups during the treatment period. In the control subjects a significant decrease (p less than 0.05) in insulin receptor binding to monocytes was observed after hormonal intake for 6 months whereas the insulin receptor binding remained unchanged in the women with previous gestational diabetes. No correlation was found between the receptor binding data obtained from monocytes and erythrocytes in either group of women. The study demonstrates that in lean nondiabetic women and women with previous gestational diabetes of normal weight without first-degree history of diabetes there is no apparent direct association between glucose tolerance, plasma insulin levels, and insulin binding to erythrocytes and monocytes during intake of low-dose oral contraceptives. 相似文献
85.
Early diagnosis of wound‐related cellulitis is challenging as many classical signs and symptoms of infection (erythema, pain, tenderness, or fever) may be absent. In addition, other conditions (ie, chronic stasis dermatitis) may present with similar clinical findings. Point‐of‐care fluorescence imaging detects elevated bacterial burden in and around wounds with high sensitivity. This prospective observational study examined the impact of incorporating fluorescence imaging into standard care for diagnosis and management of wound‐related cellulitis. Two hundred thirty‐six patients visiting an outpatient wound care centre between January 2020 and April 2021 were included in this study. Patients underwent routine fluorescence scans for bacteria (range: 1‐48 scans/patient). Wound‐related cellulitis was diagnosed in 6.4% (15/236) of patients. In these patients, fluorescence scans showed an irregular pattern of red (bacterial) fluorescence extending beyond the wound bed and periwound that could not be removed through cleansing or debridement, indicating the invasive extension of bacteria (wound‐related cellulitis). Point‐of‐care identification facilitated rapid initiation of treatments (source control and antibiotics, when warranted) that resolved the fluorescence. No patients had worsening of cellulitis requiring intravenous antibiotics and/or hospitalisation. These findings demonstrate the utility of point‐of‐care fluorescence imaging for efficient detection and proactive, targeted management of wound‐related cellulitis. 相似文献
86.
87.
88.
89.
90.